The silver was allowed to be air dried overnight. 21. Using the incorrect number of significant figures. 6. Rounding off when doing calculations. 9. After that, dilute the solution A 3 times its volume with distilled water. click site
In this reaction, the element, zinc, replaced copper in the compound copper sulfate, thus creating zinc sulfate. Even if the solution differed by few drops, it could have affected the results.Works cited:Clancy, Christina et al. There are multiple answers so number all that apply! 1. Please upload a file larger than 100x100 pixels We are experiencing some problems, please try again.
The balanced equation is Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq). This light allows the compound to absorb some of the color, if light was not absorbed the solution will remain as a clear solution. (f) The percentage yield could be increased The coiled wire was removed from the beaker after making sure that the it didn't touch any sides of the beaker. 7. However, since it is impossible to produce more than what is possible, the weighed silver yield was obviously contaminated.
Decanting too quickly and pouring some of the crystals into the waste container. 3. Leave a Reply Be the First to Comment! g.) i. More specifically it was difficult but required to keep all equipment sterilized and uncontaminated in order to prevent any interference. 7.
A major source of error occurred in the decanting process. This is because the calculated mass of the silver nitrate will be considered as the actual yield, and with the theoretical yield remaining constant and also having a greater actual yield, This time, based on two trials, the ratio between silver and copper was 2.1±.1 mol:1 mol, and the mole ratio between silver and silver nitrate was 0.96±.05 mol: 1 mol. Also to be observed in the experiment is the limiting reagent and the excess reagent.
The distilled water used in rinsing the stirring rod was collected and mixed with the beaker that has silver nitrate solution in it. 11. What should happen to people who aren t evacuated in a volcanic eruption? Pictures from the lab Purpose:to determine at what concentrations of si... Part B Pour 2 ml of hydrochloric acid into the test tube.
Posted by Bryan at 1:32 AM 4 comments: Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Evaluate: f.) In order to improve the conducted experiment that would result in an increased Add your answer Source Submit Cancel Report Abuse I think this question violates the Community Guidelines Chat or rant, adult content, spam, insulting other members,show more I think this question violates How significant are those sources of error. View Full Document The actual percent yield was %110 and our hypothesized percent yield was %95.
What indicated that a chemical reaction took place when zinc and hydrochloric acid were combined? get redirected here Place the filtration in a clean beaker and covered with 25 mL of distilled water. This is because according to the chemical equation, for every 2 moles of AgNO3, there is 1 mole of Cu. Figure 2: Beaker with Copper, and Silver Nitrate 4) Once done you will be brought to your own wiki, you can then go to under the Members section to invite new
After dissolving the crystals, the stirring rod was rinsed with a wash bottle using only 5 ml of distilled water (as close as possible) where the water has been collected with So for every gram of Cu there needs to be 5.3 grams of AgNO3, which is not the case here, as there is only 1.12 grams of silver nitrate for 0.87 Now pick your permissions, and the type of wiki, being created. navigate to this website This is because the weighing scale used to measure things in the experiment is so sensitive and can be affected by just vibrations in the air.
Please try the request again. Lab Summary: Reducing error After learning how to balance a chemical equation, our class conducted a lab on mole ratios in displacement reactions. Shaking the vial too hard. 2.
Also our experimental findings went against the hypothesized idea that a yield cannot be over %100, since it is against the law of conservation. iron (III) oxide aluminum aluminum oxide iron I. If we found the theoretical yield we can found the percentage yield: % of Ag = 1.84g Ag/066 g Ag x 100% = 279% % ofCu(NO3)2= 0.65 gCu(NO3)2/ 0.57 gCu(NO3)2x 100% This student came during his lunch on three separate days and conducted the experiment with the exact stoichiometric amounts rather than having any excess copper.
He mentioned that by doing this, he solidified his understanding of how to do the calculations. McGraw-Hill Ryerson Chemistry 11. Both ratios represented the balanced equation within the margin of error. http://phabletkeyboards.com/sources-of/sources-of-error-in-ac-circuits.php iron copper (I) sulfate iron (II) sulfate copper B.
water calcium calcium hydroxide hydrogen gas G. Previously Ann was a chemistry teacher at Niles West High School in Skokie, Illinois. Procedure (Technological: wiki spaces): 1) To create a wiki for this project, first go to http://www.wikispaces.com/ 2) Next click the Teacher button under Teachers & Students 3) Now click: Sign up As such 2 moles of AgNO3 is 339.74 grams, while 1 mole of Cu is 63.5 grams.
Fe II + CuSO4 => FeSO4 + Cu B. In addition to teaching she also serves as a College Board Consultant for AP Chemistry. For your security, this online session is about to end due to inactivity. Repeat the process to get purer silver nitrate.
You can then select 2 of the revisions by pressing the select button under the Compare category. By increasing the amount of silver nitrate we will be able to increase the theoretical yield because the theoretical yield is directly proportional to the amount of silver nitrate used in In Part B? Course Hero, Inc.
Observations such as zinc turning black soon after being placed in water indicated that a chemical reaction had taken place. Decanting too quickly and pouring some of the crystals into the waste container. 3. Percentage Yield (e) The copper nitrate is blue due to the light. Trending Now Inferno Movie Janet Jackson Jasmine Tookes Megyn Kelly 2016 Crossovers Auto Insurance Quotes Sasha Pieterse Dating Sites Sophia Loren Johnny Depp Answers Best Answer: I assume this is the
There were several sources of error within this experiment that contributed to the percent error that occurred.