Jill performs the electroplating experiment and calculates the theoretical mass of copper to be plated as 1.514 g. She weighed the brass disc (which was plated in the experiment) before and after the electroplating process: mass of disc before = 2.432 g mass of disc after = 3.721 g What was the percent yield of Jill's electroplating process? Recall, % yield = actual/ 1000

Jill performs the electroplating experiment and calculates the theoretical mass of copper to be plated as 1.514 g. She weighed the brass disc (which was plated in the experiment) before and after the electroplating process: mass of disc before = 2.432 g mass of disc after = 3.721 g What was the percent yield of Jill's electroplating process? Recall, % yield = actual/ 1000

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 29Q: When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part...

See similar textbooks

Similar questions

When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?
The following is the brief summary of procedures for Expt. 8: Step 1: The unknown stock solution was prepared by dissolving 0.5185 g of a steel sample, yielding 100.0 mL of the solution. . Step 2: Aliquot 1 was prepared by diluting 10.00 mL of the unknown stock solution to 50.00 ml.. • Step 3: Aliquot 2 was made by mixing 10.00 mL of the unknown stock solution and 3.00 mL of 9.85 x 10³ M Mn² solution (standard). and then this mixture was diluted to 50.00 ml. • Step 4: After oxidizing Mn2* to MnO4, absorbance was measured from both Aliquots 1 and 2. If the absorbance values measured from Aliquots 1 and 2 are 0.0998 and 0.148, respectively, what would be the concentration of Mn² in Aliquot 1 ([X])? Ix [X] [S]+[X] Isx = 7.14×10 M 1.22 10 M 2.8410 M 9.38×10 M 847×10 M 3
) To adjust the thiosulfate (S2O3) solution to be used as a titrant in the copper determination, excess KI was added to exactly 25.0 mL of 5.68 x 103 M KIO3 solution to liberate iodine (12) and 16.4 mL of thiosulfate solution is being consumed in the titration of I2. In this standardization process, the concentration of the thiosulfate solution is calculated. 103 +51 (excess)+ 6H*→ 31z+ 3H2O Iz+ 2S2032→ S402²-+21 Then, for copper determination 25.0 mL of 250 mL copper-aliquots is taken and treated with excess Kl. Cu²++ 21 (excess)→ Cul + % l2 The liberated l2 was titrated with the 8.2 mL of adjusted thiosulfate solution (S2O32). I2+ 2S2032> S4O,²+21- Calculate, how many milligrams of copper is found in the sample? (Cu: 63.5 g/ mol)
Qu The amount of calcium carbonate with MM:100.1 g/mol in the ore dolomite can be determined by gravimetry. The dolomite sample is dissolved in acid and the calcium ions (Ca2*) present are precipitated as calcium oxalate (CaC204) with MM: 128.1 g/mol. The calcium oxalate is filtered, dried and strongly heated to form calcium oxide (Cao) with Formula Mass (FM) = 56.1 g mol". In one analysis the mass of dolomite used was 3.72 %3D g. The mass of calcium oxide formed was found to be 1.24 g. Questions: 1. What is the chemical formula of the analyte in this problem? 2. What is precipitating agent? 3. Give the molecular formula of the precipitate measured in this problem. g. 4. What is the mass(g) of the analyte? Show your answer in correct no. of SF. 5. What is the % w/w of the analyte in the sample? Give the answer in correct answer of SF. 026.9 033.3 056 060.1 02.23
My Home * OWLV2 | Online teaching and lea x + -> cvg.cengagenów.com/ilrn/takeAssignment/takeCXPCompliantActivity.do?locator3Dassignment-take 9- CHEMICAL QUANTITIES O Previous Page 16 of 16 NextO When elemental copper is strongly heated with sulfur, a mixture of CuS and Cu2S is produced, with CuS predominating. Cu(s)+ S(s) CuS(s) 2Cu(s) + S(s) → Cu,S(s) What is the theoretical yield of CuS when 34.20 g of Cu(s) is heated with 45.70 g of S? (Assume only CuS is produced in the reaction.) Theoretical yield = What is the percent yield of CuS if only 31.8 g of CuS can be isolated from the mixture? Percent yield =
Name the process for the benefaction/concentration of: (i) an ore having impurities lighter than it (ii) Sulphide ores.
balance: KMnO4(aq) + Na2SO3(aq) + KOH → MnO2 + Na2SO4(aq) ; the coefficient for Na2SO3 is: (hint: keep MnO2 intact) A. 2 B. 1 C. 3
Balance the following reactions: A. Pb(CH3CO0)2 + Na,SiO3 → PbSiO3 + NaCH3COO B. C2H5OH + 02 CO2 + H20 Paragraph B IU A Lato (Recom... 19рх ... 99+ lih II
In the 2018 Olympics, a total of 340 gold medals were given to players. An Olympic gold medal have at least 6 g of Au (gold) and 92.5% silver. Assume each medal is prepared by layer a 60-mm diameter and 3-mm thick, gold-free silver alloy disk with gold thru electrolytic deposition by means of a gold (III) solution, identify time required (hrs) to polish all the gold medals with the given gold content and has a steady current of 50A. (Molar mass = 196.97 g/mol)
The number of Faraday of charge needed to deposit 1.99 x 10-4 moles of Ni+2 ion from its solution is ……………………… a. 39.8 x 10-4 b. 3.98 x 10-3 c. 3.98 x 10-4 d. 3.98 x 10-2
Q1) a) What is i) a standard solution? ii)a reduction-oxidation (redox) reaction? b) A standard solution of hydrated Iron (II) sulphate, FeSO..xH20, as prepared by dissolving 5.8g of the salt in a volumetric flask making it to 250ml (250 cm), 25ml (25 cm') of this solution was acidified and found to react with 22.8ml (22.8 cm) of 0.018MPotassium permanganate solution. The half equation for the reaction are: Mn2+ 4H,O Feog) Fe2 (aq) + e ) What is the indicator for the titration of Iron(Il)sulphate and Potassium permanganate solution? i)indicate the colour at the end point if the permanganate is in the burette. )Why is it necessary to acidify the Iron(I)sulphate before titration ?
1/variants/434511/take/11/ ő ő ó ó ó ó o o 20 Total Questions Answered Question 13 Which comparison correctly ranks the "activity" (strength as reducing agents) of the elements Cu, Cd, and Zn, given the following observed reactivity information? Zn + CuBr₂ → Cu + ZnBr₂ Cd + ZnBr → No Reaction Cu + CdBr→ No Reaction 2 A Zn > Cu > Cd B Zn > Cd> Cu C Cd > Cu > Zn D Cu > Cd > Zn 0 0 0 0 ŏ o o o o o o o o o 9:47 PM 6/9/2023