Effect of Molecular Weight on the Rate of Diffusion

Effect of Molecular Weight on the Rate of Diffusion Olive Kristianne C. Quicoy Group 4 Sec. Y-5L October 7, 2015 ------------------------------------------------- A scientific paper submitted in partial fulfillment of the requirements in General Biology 1 laboratory under Ma’am Joan Christine O. Adajar, 1st sem., 2015-2016 ABSTRACT The relationship of molecular weight and rate of diffusion was determined using three colored substances with different molecular weights, namely Potassium permanganate, Potassium dichromate and Methylene Blue. A water-agar gel in a petri dish was used to be able to observe the movement of the particles of each substance. Potassium dichromate had the fastest rate of diffusion among the three substances.†¦show more content†¦The average rate of diffusion of each substance was also computed. The set-up was again observed and drawn after 30 minutes for comparison. Graphs comparing the molecular weights and average rates of diffusion, and time and partial rates of diffusion were then plotted and analyzed. RESULTS AND DUSCUSSION As seen in Table 1.2, Potassium dichromate and Methylene Blue had the same diameter – 6.0 mm – at 0 minute while Potassium permanganate had a diameter of 7.0 mm during the same time. After 30 minutes, Potassium permanganate, Potassium dichromate and Methylene Blue had the diameters of 9.0mm, 12.0mm and 10.0mm, respectively. Potassium dichromate had the largest increase in diameter among the three after 30 minutes. Table 1.1. Diameters of the colored areas made by Potassium permanganate (KMnO4), Potassium dichromate (K2Cr2O7) and Methylene Blue in Agar Water Gel Time(minute) | Diameter (mm) | | Potassium permanganate(MW= 158 g/mole) | Potassium dichromate(MW= 294 g/mole) | Methylene Blue(MW= 372 g/mole) | 0 | 7.0 | 6.0 | 6.0 | 3 | 8.0 | 8.0 | 7.0 | 6 | 9.0 | 9.0 | 8.0 | 9 | 9.0 | 9.0 | 8.0 | 12 | 9.0 | 10.0 | 8.0 | 15 | 9.0 | 10.0 | 9.0 | 18 | 9.0 | 10.0 | 9.0 | 21 | 9.0 | 11.0 | 9.0 | 24 | 9.0 | 11.0 | 9.5 | 27 | 9.0 | 11.0 | 9.5 | 30 | 9.0 | 12.0 | 10.0 | At 0 minute, the colors of Potassium permanganate, PotassiumShow MoreRelatedThe Effect of Molecular Weight on the Rate of Diffusion of Potassium Permanganate (Kmno4), Potassium Dichromate (K2Cr2O7) and Methylene Blue  ¹1556 Words   |  7 PagesThe Effect of Molecular Weight on the Rate of Diffusion of Potassium permanganate (KMNO4), Potassium dichromate (K2Cr2O7) and Methylene blue  ¹ ABSTRACT The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. Each substance has a respective molecular weight of 158 g/mol, 294g/mol and 374 g/mol. The diameters (in millimeter) were measuredRead MoreThe Effect of Different Molar Mass on the Diffusion on Substances1585 Words   |  7 PagesThe Effect of Different Molar Mass on the Diffusion on Substances Lunar-maius A. Gaerlan Group 2 Sec. X – 9l August 15, 2012 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test. The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4), potassium dichromate (K2Cr2O7) and methylene blue(C16H18N3SCl) were simultaneously introduced to each well. Methylene blueRead MoreFormulation, Testing of Hypothesis, and Experimental Design1270 Words   |  6 Pagesdefine diffusion and demonstrate this process in gases b. to cite molecular weight and time as two factors affecting the rate of diffusion c. to formulate a hypothesis on the relationship of each of these factors on the rate of diffusion d. to conduct and experiment to determine the effects of the two factors on the rate of diffusion e. to compute the partial rate and average rate of diffusion f. to conclude on the relationships of molecular weight and time on the rate of diffusion Read MorePhysio Ex 9.0844 Words   |  4 Pages(Simple Diffusion) Answers 1. The molecular weight of urea is approximately 60. Which of the membranes can it pass through? a. 50 MWCO membrane b. 100 MWCO membrane c. 200 MWCO membrane d. Both the 100 and 200 MWCO membranes D. Both the 100 and 200 MWCO membranes 2. True or False: A solution containing glucose will diffuse faster through a 200 MWCO membrane if it is heated. True 3. The molecular weight of carbon C is 12; the molecular weight of hydrogen (H) is 1; the molecular weightRead MoreEssay about Laboratory #1 - Cell Physiology1037 Words   |  5 PagesReview Sheet 1 Results 1. Describe two variables that affect the rate of diffusion. Your answer: Two variables that affect the rate of diffusion are the MWCO membrane and the solute concentration. Increasing the membrane size and solute concentration will also increase the average diffusion rate. Decreasing the membrane size and solute concentration will reduce diffusion rates and can even prevent all diffusion. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membraneRead MorePhysioex 9.0 Cell Transport Mechanisms1586 Words   |  7 PagesFor Learning Centre use only Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Review Sheet Results 1. 2. Describe two Variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: A. The size of the molecule. The larger molecule will diffuse more slowly than the smaller molecule. B. The nature of plasma membrane. If the membrane is composed of lipid portion., only lipid soluble molecules can pass through while water moleculesRead MoreDiffusion Of Dye Through Agar Gel Essay1672 Words   |  7 PagesINTRODUCTION: DIFFUSION OF DYE THROUGH AGAR GEL Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. The rate at which molecules diffuse can be determined by the relationship of molecular weight and that rate of diffusion through a membrane. Hypothesis of this experiment is that the fluid with higher molecular weight will diffuse at a slower rate and distance. METHODS AND MATERIALS: DIFFUSION OF DYE THROUGH AGAR GEL In order to assimilateRead MoreLab Report On Osmosis1356 Words   |  6 Pagesof diffusion and osmosis. Several miniature experiments were conducted to test the different conditions that affect the rates of diffusion, how osmosis works, how a selectively permeable membrane works, and how plasmolysis affects plant cells. The dyes of potassium dichromate, Janus green, and aniline blue were used to show the process of diffusion at varying temperatures. The dyes differed in their molecular weight. This difference in weight had a direct effect on the rate of diffusion. TheRead MoreExercise 1685 Words   |  3 Pagesmove through the 50 MWCO membrane? Activity 2: 1. Are the solutes moving with or against their concentration gradient in facilitated diffusion? 2. What happened to the rate of facilitated diffusion when the number of carrier proteins was increased? 3. In the simulation you added Na+Cl- to test its effect on glucose diffusion. Explain why there was no effect. Activity 3: 1. Which membrane resulted in the greatest pressure with Na+Cl- as the solute? Why? 2. Explain what happens to the osmoticRead MoreTypes Of Transport Within A Cell1219 Words   |  5 Pagesof this property, the plasma membrane is called a selectively permeable membrane and it has two basic transport processes. In passive transport processes it is the concentration differences that drives the movement. The two passive transports are diffusion and filtration. In active transport processes the cell provides energy in the form of Adenosine Triphosphate (ATP) to power the process. The two active transport processes are primary which is driven directly by ATP or secondary which is driven indirectly

NFLDraft Busts Free Essays

NFL Drafts are always an exciting time. So many predictions, so much expert analysis, so much time, money, and energy all spent on one goal: To decide which players will have success in the NFL. An enormous amount of hard work goes into drafting a single player. We will write a custom essay sample on NFLDraft Busts or any similar topic only for you Order Now Teams spend countless hours, days, months, and even years trying to figure out which prospects have the greatest potential to find success. The NFL Draft consists of 7 rounds of all the rounds the first round is the most hyped and anticipated and understandably so as some of the best college players are drafted in this round. When drafted in the first round the future prospect has to live up to the enormous expectations that come with being drafted in the first round. Some go on to find success in the NFL and fulfill their duty as a first round pick, however there are many circumstances in which first round picks fail to live up to the expectations. In that scenario they are considered a â€Å"Bust†. Although first round picks have enormous pressure to perform well they are also very handsomely paid. In 2008, the average guaranteed salary for a first-round pick in the NFL was $11,924,000. For second-round picks, that number drops to $1,932,000, while third-round picks averaged $668,000 guaranteed. The steep drop illustrates the significant financial importance a higher draft slot has for a prospect. So it’s easy to see why there is so much pressure on first round picks. However the first round is not the only round of the draft there are six more rounds behind it. Teams can defiantly find talent in all rounds of the Draft. Hall of Fame quarterback Joe Montana was drafted in the third round, 3-time MVP Brett Favre was drafted in the 2nd round and 3-time Super Bowl winner and future Hall of Famer Tom Brady was drafted in the 6th round with the 199th overall pick. Even with all the great NFL Draft picks there are some really horrible and frankly stupid draft decisions. For every Tom Brady there is a JaMarcus Russell. With that being said we now break down the Top 10 worst draft picks in NFL history. Picks that cost their teams millions and the chance to draft future NFL stars and Hall of Famers. 10. Jeff George, QB, Illinois (1990 / Round: 1 / Pick: 1) The Colts traded to draft George, making him the first pick in the 1990 draft, and then rewarded him with the richest rookie contract in NFL history. What should have been a dream career with his hometown Colts turned ugly almost from the start? By the time it ended after four seasons with a trade to the Atlanta Falcons, he had made vile gestures to the hometown fans, argued with Coach Ted Marchibroda, held out for 36 days, and tried to get a trade. George would turn out to be a journeyman quarterback being on seven different teams. He had a passer rating of 80. 4 and threw for 27,602 yard with 154 Touchdowns and 113 interceptions. 9. Blair Thomas, RB, Penn State (1990 / Round: 1 / Pick: 2) Thomas was drafted by the New York Jets in the first round (second overall) of the 1990 NFL Draft. His NFL playing career spanned six seasons. Despite leading NFL rookies in yards-per-carry and AFC rookies in total yardage, he is widely considered another in a long line of Jets draft disappointments. Thomas rushed for only 2,000 yards and five touchdowns in his four seasons with the Jets. Thomas suffered a series of nagging injuries beginning in 1992 and was released by the Jets following the 1993 season. He began the 1994 season with the New England Patriots, but finished it with the Dallas Cowboys. He concluded his NFL career with the Carolina Panthers in 1995. 8. Akili Smith, QB, Oregon (1999 / Round: 1 / Pick: 3) Taken by the Cincinnati Bengals with the No. 3 overall pick in 1999 draft, Smith never grasped the complexities of the NFL game and failed to show the work ethic required to succeed in the league. He started just 17 games over four years with the Bengals, throwing just five touchdowns. He had two failed comebacks with the Packers and Buccaneers before an uneventful, short stint in the CFL. As for life after football, in March 2010 Smith became a graduate football assistant at Cal. He was hired by head coach Jeff Tedford, who previously coached Smith at Oregon as offensive coordinator. 7. Lawrence Phillips, RB, Nebraska (1996 / Round: 1 / Pick: 6) Phillips was drafted sixth overall in the 1996 NFL Draft by the St. Louis Rams despite his considerable character issues; several teams with higher picks declared they passed on him because of his off-the-field troubles. Phillips played the 1996 and part of the 1997 seasons with the Rams before refusing to show for a team meeting and practice in a dispute with coach Dick Vermeil over playing time in November 1997. The Rams cut Phillips in 1997.. Phillips is arguably one of the biggest draft day blunders in NFL history, the Rams thought so highly of him that the team traded his predecessor, Jerome Bettis, to the Pittsburgh Steelers immediately after drafting Phillips, a trade that would later prove beneficial to the Steelers. After the Rams he played two games with the Miami Dolphins before being cut. He later played for the 49ers, CFL, AFL, and NFL Europe. His lone career highlight is an infamous one as he missed a crucial block on all-pro cornerback Aeneas Williams who proceeded to knock out Steve Young during a Monday Night Football game against the Arizona Cardinals. This injury would lead to the end of Young’s career. Phillips had one run-in with the law after another after his playing career was over, none worse than the one that sent him to prison last December for attacking his girlfriend and driving his car into three teens. He is currently serving a 31 year prison sentence. 6. Charles Rogers, WR, Michigan State (2003 / Round: 1 / Pick: 2) The No. 2 overall pick in 2003 by Detroit lasted just three seasons in the NFL, and caught just 36 passes in his 14-game career. Poor attitude, injuries, and a drug habit contributed to his failures as an NFL player. After getting cut by the Lions in 2005, the same year the NFL suspended him for substance abuse, he had tryouts with the Dolphins, Patriots and Buccaneers in 2006, but was not signed. His career was finished. After his career was over Rodgers did not face much better off the field. He was arrested in September 2008 and charged with assault and battery of a female acquaintance. In December 2008, Rogers was sentenced to attend sobriety court or face jail time after violating his probation after testing positive for vicodin. In March 2009, Rogers was jailed for violating probation. On September 16, 2009, Rogers was arrested in Novi, MI for driving under the influence of alcohol after being found unresponsive behind the wheel of his car by police. Rogers was arrested again in Novi, MI on January 5, 2010, having passed out after drinking at an On the Border restaurant, which was a violation of a sobriety court order, and subsequently sentenced to a 93-day jail term. And last month, Rogers was ordered to return $6. 1 million of his $9. 1 million signing bonus to the Lions because his drug use violated the terms of his NFL contract. 5. Heath Shuler, QB, Tennessee (1994 / Round: 1 / Pick: 3) Shuler was a first-round selection in the 1994 NFL Draft, taken by the Washington Redskins with the third overall pick. ESPN rated him the 4th biggest NFL Draft bust of all time. [3] He held out of training camp until he received a 7-year, $19. 25 million contract. The Redskins had fallen on hard times since winning Super Bowl XXVI, and Shuler was looked on as the quarterback of the future. However, Shuler’s poor play contributed to a quarterback controversy with fellow 1994 draft pick Gus Frerotte. This was showcased when Shuler threw five interceptions in a game against the Arizona Cardinals. Shuler started only 18 games in his first two years with the team and was benched in his third year, as Frerotte went to the Pro Bowl. He was out of the NFL by 1997. As a pro, his career passer rating was a horrible 54. 3 and in 2004 ESPN rated him the 17th biggest ‘sports flop’ of the past 25 years. Despite his NFL career being a disaster unlike most of the previous top draft busts Shuelr actually did something with his life. After retiring from the NFL, Shuler returned to the University of Tennessee and completed his education, graduating with a degree in psychology. He then became a real estate professional in Knoxville. His real estate company is one of the largest independent firms in East Tennessee. Shuler is a Democratic member of the United States House of Representatives, representing North Carolina’s 11th congressional district since 2007. 4. Tony Mandarich, OT, Michigan State (1989 / Round: 1 / Pick: 2) He was the first round draft pick of the Green Bay Packers in 1989, second overall behind Hall of Fame quarterback Troy Aikman, and ahead of the third selection, Hall of Fame running back Barry Sanders, the fourth selection, Hall of Fame linebacker Derrick Thomas, and the fifth selection, perennial All-Pro cornerback Deion Sanders. In 1989, Sports Illustrated called him â€Å"The Best Offensive line prospect ever†. But his career led into what is considered by many to be one of the biggest busts in NFL history. The â€Å"Incredible Bulk† came into the league as one of the most hyped players in NFL draft history. Both scouts and media began haling Mandarich as the best offensive line prospect ever, touting his â€Å"measurables†, â€Å"He weighed 304, ran the 40 in 4. 65 seconds, did a standing long jump of 10’3†³, leaped vertically 30†³ and bench-pressed 225 pounds an unbelievable 39 times†. The No. overall pick of the Packers in 1989 never lived up to the incredible hype, and after just three disappointing seasons in Green Bay, he was cut. In an ironic twist Sports Illustrated featured Mandarich on its cover s again, however this time labeling him â€Å"The NFL’s Incredible Bust† quite a stark contrast from the previous slogan of The â€Å"Incredible Bulk†. Mandarich later admitted to using steroids all throughout his college career at Michigan State yet he insisted that he played his NFL career clean. 3. Tim Couch, QB, Kentucky (1999 / Round: 1 / Pick: 1) The top overall pick in the 1999 draft was supposed to be the franchise quarterback for the newly re-coined Cleveland Browns. Drafted before Donavan McNabb there were high expectations for him in Cleveland. Their GM boldly predicted that Couch would win six playoff games. Although Couch did lead the browns to the playoffs most of his time in Cleveland was marred with boos, inconsistent play, and injuries. Couch was plagued by nagging injuries and an inexperienced offensive line; also he just simply didn’t have the makings of an NFL quarterback. After getting cut by the Browns in 2004, he had two failed comebacks and also had a 2 year stint in the CFL. 2. Ryan Leaf, QB, Washington State (1998 / Round: 1 / Pick: 2) Ryan Leaf at number 2 on the all time bust list? Is this a joke? No there is somebody who we believe is worse than Leaf but don’t get me wrong Leaf was one of the biggest busts not in just the NFL but in professional sports history. There were actually scouts out there who thought Leaf would make a better pro than Peyton Manning. THE Peyton Manning. Although that notion seems ridiculous now there were quite a few people who believed Leaf was the better QB. Good thing for the Colts they picked Manning over Leaf, too bad the same can’t be said for the San Diego Chargers. In the third game of his first season Leaf completed one of fifteen passes for 4 yards and fumbled three times in a loss against the Kansas City Chiefs. He was benched after throwing two touchdown passes and thirteen interceptions in nine games, and replaced by Craig Whelihan. After ten games, Leaf had thrown two more interceptions, passing for a total of 1,289 yards, with a 45. 3 percent completion rate and a passer rating of 39. Leaf had poor relationships with the media and his teammates. In one infamous locker room incident during Leaf’s rookie year, he was caught on-camera screaming at San Diego Union Tribune reporter Jay Posner, â€Å"Just f**king don’t talk to me, all right! Knock it off! † and had to be physically restrained by teammate Junior Seau. Another on-camera incident involved Leaf confronting a heckling Chargers fan during a practice session. Two coaches had to restrain Leaf and escort him off the field. Following more poor performances and injury problems, he was released by the Chargers after the season, with four wins as a starter in three years. Unfortunately for Leaf his life didn’t improve off the field either. He has been in trouble with the law multiple times and is currently serving 10 years of probation after pleading guilty in Amarillo, Texas, to eight felony drug charges and losing his job as an assistant football coach at West Texas Aamp;M. 1. JaMarcus Russell, QB, LSU (2007 / Round: 1 / Pick: 1) Presenting the biggest NFL Draft bust of all time. It will truly take great skill to be worse than JaMarcus Russell. Drafted number one overall in the 2007 Draft Russell turned out to be one of the worst draftees of all time. He was hailed as the man who could finally save the hapless Oakland Raiders. He was thought to return them to greatness. He was supposed to be the Franchise. Now he’s out of the franchise but not before talking $40 million and cementing his legacy as the worst draft pick EVER! Failing to reach a contract agreement with the Raiders, Russell held out through training camp and the first weeks of the 2007 NFL season, until September 12, 2007, when he signed a six-year contract worth up to $68 million, with $31. 5 million guaranteed. He is 7-18 as an NFL starter, which is the worst record by a quarterback who was a No. 1 overall pick. He threw for 18 touchdowns and threw 23 interceptions. He threw for 4,083 yards and had a passer rating of 65. 2 He is the fastest quarterback who was a top pick to be released by his drafting team. Russell lasted three years in Oakland. Russell was often cited as being lazy, overweight, and unintelligent. He showed up to camp weighing an astonishing 300 lbs! A ridiculously high number for an NFL quarterback. Although Russell’s numbers are superior to Ryan Leaf’s; Leaf only cost the chargers $11 million, JaMarcus on the other hand cost the Raiders $40 million. So there you have it JaMarcus Russell THE biggest Draft Bust in NFL history. How to cite NFLDraft Busts, Papers

Rousseian Happiness free essay sample

So with society man cannot be justly happy? But I sit here now with a smile on my face; I go to the movies and hear people speak of bliss, I read the paper and understand certain article to be good news, so I must ask Rousseau how this is not happiness? The key here is to find a way to differentiate between the happiness Rousseau is talking about and the happiness we have come to accept today. Happiness, like so many things In the state of modern man, is born and created through subjectivity. Just like Plats cave, whether we are those shackled or those that run free, we all see he rock.And maybe to some that rock Is projected, but why does that matter? The shackled ones see that projection and that Is their reality, Just as the philosophers see a rock In the shelling sun and that Is their reality. We will write a custom essay sample on Rousseian Happiness or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page So whos to say which reality Is better? In terms of Rousseau happiness we are content until we break from our savage man and began to search for something more. When we question our reality we break free of happiness, when we wonder what more there is to know we take ourselves from the simplistic contentment of savage and complicate our lives with useless cocktail knowledge.Since it is obvious that the Republic is a piece of literature that Rousseau often refers back to and appreciates; we find hypocrisy. That is to say that the Philosophers that come down and break the shackled ones from their state of content with the projection, that pull them from the cave and shows them the real rock, are only teaching them something new, something useless, and therefore something that Is counter-Intuitive to the type of happiness Rousseau defines. So here we find the first piece of evidence against Rousseau Idea of malcontent of the modern man. Here we are at a crossroads: can we call ourselves happy if we break from our objectivity? Or does it matter? Ultimately, Rousseau is correct in the sense that if we take an objective look at society as a whole, it hasnt really accomplished anything. Our definitions, our sciences, our religions have not made us happier; they have simply made things more complex for us. The thing is, though, that we do not have objective perspective. We see our lives only through our own eyes; we experience things only through our own minds and actions.We do not know what the person next to us Is thinking, how they might react to being hit, how they may interpret our language. We know only how we think. So we can only define happiness by our own means. The tricky part here Is that there Is some hypocrisy In the statement Just made. Happiness is something of value. In meaning that man does not define happiness ourselves. We must see starving children in Africa, we must know someone homeless on the streets; we must feel sympathy. In the literal sense, not the Rousseau, we must feel pity.Only until we see this degradation, can we compare and tell ourselves that we are happy because we are not what they are. With this we must then say that for there to be happiness there must be value. And for value to be real there must be society. Since when man is on his own he has no means to compare, so he has no means to value. And in the absence of value we cannot find happiness, we can only find bland contentment. Just as Rousseau states that in his state of nature there is no evil because man cannot know of any evil, he sees no purpose behind it.We can then also state that savage man can know no good, other than good for himself, because he sees no purpose behind it. And with that we can say that man knows no happiness, because happiness requires comparison, and man knows no comparison in the state of nature. To conclude we must take what has been said and make sense of. The argument is tricky in the respect that it states the need for objectivity to define happiness, but that happiness is ultimately subjective.What is meant by this is that although we know no happiness without value through objectivity, we also vary in our personal definitions of happiness. One may be happy for killing their wife, while another may be riddled with despair over the mistake of pulling the trigger. Happiness is defined by the general value of mankind, but each individual makes it fit to their own means. With this we can say that savage man knew no happiness and only socialized man does.