# Llab

Powerful Essays
757 Words
Grammar
Plagiarism
Writing
Score
Llab
Determining the Percentage Yield of a Chemical Reaction Name: Whitby Phuong Teacher: Ms. Li Course Code: SCH-3U1 Introduction Experiments carried out in real life may differ from the results based on theory. Reasons may include incontrollable work environments, competing reactions (where other reactions may occur at the same time as the principle reaction, the experimental design and techniques, and also due to impure reactants, since theoretical yield assumes that reactants are pure. (SCH-3U1 chemistry notes, Ms. Li) This lab is to identify the results that are determined by doing real life experiments, and compare the data based on theoretical results, which is then used to determine the percentage yield, or the accuracy of the real life experiment. In this lab, we will be using copper chloride dihydrate, and mixing it with water and iron, causing a single displacement reaction (Fe + CuCl2  FeCl2 + Cu). The purpose of this lab is to investigate the amount of copper that is displaced and compare the actual amount to the theoretical amount, and finding the percentage yield of copper using that information to determine its accuracy. (Chemistry 11. Canada: 2001.) Analysis Fe + CuCl2  FeCl2 + Cu {draw:frame} A. Using the mass of the iron (steel wool) you used, calculate the theoretical yield of the copper, in grams. Amount of steel wool used: 1.004 grams MFe= 55.845g/mol nFe= 1.004 grams/55.845 nFe= 0.01798 mol of Fe ∴ The percentage yield of copper is 5.071g by theory. B. How does the mass of the copper you collected compared with the expected theoretical yield? The amount of copper collected after evaporating the waste water was 1.183 grams, compared to the amount of copper theoretically that is supposed to be produced, which is 1.142g. The amount of copper tends to weigh slightly more than it is intentionally, by a difference of 0.041 grams heavier. Amount of CuCl2 · 2H2O used: 5.00 g MCuCl2 · 2H2O = 170.45g/mol MCuCl2= 134.45g/mol

## You May Also Find These Documents Helpful

• Satisfactory Essays

When the Fe(s) was completely consumed, the precipitated Cu had a mass of 3.2 grams. Did the student’s result on this experiment verify the mole ratio of Fe(s) to Cu as predicted by the equation?…

• 641 Words
• 3 Pages
Satisfactory Essays
• Good Essays

1. Calculate the mass of zinc chloride produced. You know the original mass of the beaker. You also know the mass of the beaker plus the product you produced, which is zinc chloride. The difference…

• 1376 Words
• 6 Pages
Good Essays
• Satisfactory Essays

5. Determine the percent yield of this reaction, showing all steps of your calculation. (3…

• 428 Words
• 5 Pages
Satisfactory Essays
• Good Essays

My percentage yield was far more than the expected 100%. An explanation would be that there was water left over on the precipitate that added to its extra weight.…

• 432 Words
• 2 Pages
Good Essays
• Powerful Essays

Know how to calculate percent yield (i.e. CuSO4 was obtained from the reaction of CuO with sulfuric acid. If 2.5 g of CuSO4 was obtained from 5.0 g of CuO, what is the percent yield?)…

• 3033 Words
• 13 Pages
Powerful Essays
• Good Essays

a. If you did not wash all of the Calcium Carbonate out of the beaker and into the filter during step 5, would your percent yield be larger or smaller?…

• 483 Words
• 2 Pages
Good Essays
• Satisfactory Essays

In the data table above, the mass of penny, copper, and zinc was needed in order to determine the percent composition of copper and zinc. The mass of penny was taken on the scale in the beginning of the procedure before anything was done to the penny, and it was 2.51 grams. After the reaction with the hydrochloric acid and drying the copper, the mass is 0.35 grams. To get the mass of zinc, the mass of the penny was subtracted by the mass of copper. The mass of zinc is 2.16 grams. The penny is 14% copper and 86% zinc by dividing the metal’s mass to the penny’s mass. However, the theoretical percentage is 97.5%, and the percentage collected in this experiment was 86% so there has to been some errors along this test.…

• 286 Words
• 2 Pages
Satisfactory Essays
• Good Essays

The percent yield was calculated to be 171% indicating a source of error. The high percent yield was due to the product being wet since we did not have enough time to dry the product with the vacuum filter—since we had to evacuate the building due to the fire alarm. If we were able to vacuum filter our product more, the percent yield would be close to 100%.…

• 444 Words
• 2 Pages
Good Essays
• Good Essays

Purpose: The purpose of this experiment is to: determine the limiting reactant of a chemical reaction that involves iron filings and a copper sulfate solution. Second, to determine the mole ratios between iron and copper and to show that a single replacement reaction occurs when iron and copper sulfate react with each other. And lastly, to determine/calculate the percent yield to better analyze the chemical reaction between iron and copper sulfate to produce copper and iron sulfate. The method used to perform this lab will be to combine a metal with a solution to produce a chemical reaction causing one element to replace another element and isolating the product from the liquid to determine its mass.…

• 1212 Words
• 5 Pages
Good Essays
• Good Essays

6. This occurs when reactions are not allowed to finish resulting in some of the unwanted precipitate remaining behind. The unwanted precipitate will not precipitate in the subsequent reactions. If the final copper sample is not dry before you weight it could weigh more than 100%…

• 646 Words
• 3 Pages
Good Essays
• Satisfactory Essays

My percentage yield is actually quite close to a perfect percentage yield, which I am pleased about. The theoretical vs actual in this experiment is so close where the possible sources of error are quite slim in this case. It is always possible that all of the substance from the beaker was not accurately weighed due to some CaCO3 reside being left on the sides of the beaker.…

• 317 Words
• 2 Pages
Satisfactory Essays
• Good Essays

The Right Fit: Distribution and Collections Models for FMCG Companies in Asia Insights | Corporate Clients Asia Pacific has a rapidly growing and highly competitive Fast Moving Consumer Goods (FMCG) sector, with strong domestic and regional players, as well as multinational companies. A significant differentiator for companies operating in this sector is the efficiency of their distribution chains. Put simply, not having the right products available, in the right place, at the right price, means that a company is unable to win market share. FMCG companies in Asia Pacific use four broad types of distribution models: company-owned and managed; distributor driven; sole distributor; and modern retail.…

• 1479 Words
• 6 Pages
Good Essays
• Powerful Essays

As the leading outdoor apparel company, L.L. Bean has been successful in many ways. L.L. Bean is one of the only few apparel companies who offered its products by mail-ordering. L.L. Bean make use of style catalog to rise customers’ interest to buy its products. Though massive catalog distribution, the company was able to attract a large number of new customers in 19th century. Along with its innovative catalog distribution-marketing concept, L.L. Bean’s philosophy of providing quality apparel, footwear and equipment to outdoorspeople at the fairest possible prices and with the most efficient and accommodating service has made the company standout from its major competitors. The company uses word of mouth as one of its major advertising tools, believing its exceptional product quality and customer services would make the customers advertise for them, as well as stand part from its competitors. With continued growth in mail-order and merchandise sales, L.L. Bean was able to expand its product lines and stores rapidly in 1979. As the company grows, L.L. Bean’s grandson Gorman, took advantage of the recreation boom. He allocated a larger budget for advertisement and offered free catalogs for customers, along with this Gorman computerized the company’s catalog mailing list and the order-entry and inventory system, the new technologies which the company has adopted has enhanced the sales further from \$3 million in 1967 to \$30 million in 1975, on top of this, the buyer list went fro 325,000 to 860,000.…

• 1612 Words
• 7 Pages
Powerful Essays
• Satisfactory Essays

If there’s one topic that writers can be counted on to tackle at least once in their working lives, it’s writing itself. A good thing too, especially for all those aspiring writers out there looking for a little bit of guidance. For some winter inspiration and honing of your craft, here you’ll find ten great essays on writing, from the classic to the contemporary, from the specific to the all-encompassing. Note: there are many, many, many great essays on writing. Bias has been extended here to personal favorites and those available to read online. Also of note but not included: full books on the subject like Anne Lamott’s Bird by Bird, Stephen King’s On Writing, and Ron Carlson’s Ron Carlson Writes a Story, or, in a somewhat different sense, David Shields’ Reality Hunger, for those looking for a longer commitment. Read on, and add your own favorite essays on writing to the list in the comments.…

• 422 Words
• 2 Pages
Satisfactory Essays
• Good Essays

b. What is my percent yield of iron (II) chloride if my actual yield is 4 grams?…

• 975 Words
• 4 Pages
Good Essays