Zinc and Copper Reaction Concepts

Zinc and Copper Reaction Concepts

Assessment

Interactive Video

Chemistry, Science, Mathematics

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains how to calculate the actual yield of copper in a reaction where zinc reacts with excess copper sulfate solution, given a percent yield of 85%. It covers writing the balanced chemical equation, calculating the theoretical yield using mole ratios, and determining the actual yield by applying the percent yield to the theoretical yield.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent yield given in the problem for the reaction involving zinc and copper sulfate?

85%

90%

95%

75%

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the balanced chemical equation for the reaction between zinc and copper sulfate?

Zn + CuSO4 → ZnSO4 + Cu

Zn + CuSO4 → Cu + ZnO

Zn + CuSO4 → Zn + CuSO4

Zn + CuSO4 → ZnO + CuSO4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of zinc used in the calculation?

66.4 g/mol

63.5 g/mol

65.4 g/mol

64.5 g/mol

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many moles of zinc are calculated from 32.5 g of zinc?

0.4969 moles

0.4696 moles

0.4699 moles

0.4996 moles

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mole ratio of zinc to copper in the reaction?

1:3

1:2

2:1

1:1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of copper used to calculate the theoretical yield?

63.5 g/mol

65.4 g/mol

64.5 g/mol

66.4 g/mol

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the theoretical yield of copper in grams?

30.6 g

32.6 g

33.6 g

31.6 g

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