Zinc and Cobalt Reaction Concepts

Zinc and Cobalt Reaction Concepts

Assessment

Interactive Video

Chemistry

10th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers a stoichiometry problem involving cobalt sulfate and zinc metal under oxidation-reduction conditions. It explains the setup of the problem, the reaction process, and the calculations needed to determine the mass of cobalt produced. The tutorial also discusses the concept of limiting reactants and provides cautionary notes on activity series and reduction potentials. Examples of reactions with zinc and magnesium are provided to illustrate the concepts.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main question addressed in the stoichiometry problem involving cobalt(II) sulfate and zinc metal?

Can zinc metal reduce cobalt(II) sulfate?

Can cobalt(II) sulfate reduce zinc metal?

Can zinc metal oxidize cobalt(II) sulfate?

Can cobalt(II) sulfate oxidize zinc metal?

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction between zinc metal and cobalt(II) sulfate, what is the net ionic equation?

Zn + CoSO4 → ZnSO4 + Co

Zn + Co^2+ → Zn^2+ + Co

Zn^2+ + Co → Zn + Co^2+

ZnSO4 + Co → Zn + CoSO4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many moles of zinc are present when 2.6 grams of zinc is used?

0.398 moles

0.95 moles

0.152 moles

0.6539 moles

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which reactant is the limiting reactant in the reaction between zinc and cobalt(II) sulfate?

Cobalt metal

Zinc

Cobalt(II) sulfate

Zinc sulfate

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mass of cobalt produced from the reaction?

58.93 grams

0.398 grams

1.52 grams

2.35 grams

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does no reaction occur when zinc metal is mixed with magnesium metal?

Zinc has a higher reduction potential than magnesium.

Zinc and magnesium form a stable compound.

Magnesium has a higher reduction potential than zinc.

Both metals are neutral and have no desire for electrons.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when zinc ion is mixed with magnesium metal?

No reaction occurs.

Zinc ion gains electrons from magnesium.

Magnesium ion gains electrons from zinc.

Zinc metal forms a compound with magnesium.

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