Oxidation-Reduction

Question 1

What are the oxidation numbers of the atoms in this reaction?Check all that apply.Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)

Revolt · Accepted Answer

0 for Mg(s) and H in H2; +1 for H in HCl; -1 for Cl in HCl; +2 for Mg in MgCl2

Question 2

What are the oxidation numbers of the atoms in this reaction?Check all that apply.CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

Revolt · Accepted Answer

-4 for C in CH4; +4 for C in CO2; +1 for H in both CH4 and H2O

Question 3

Use the drop-down menus to complete the sentences. The gain of electrons is called

Revolt · Accepted Answer

reduction.

Question 4

The loss of electrons is called

Revolt · Accepted Answer

oxidation.

Question 5

Cu2+ + e− → Cu+Cu2+ is

Revolt · Accepted Answer

reduced.

Question 6

Fe → Fe3+ + 3e−Fe is

Revolt · Accepted Answer

oxidized.

Question 7

F + e− → F−F− is

Revolt · Accepted Answer

reduced.

Question 8

2l− → l2 + 2e−l− is

Revolt · Accepted Answer

oxidized.

Question 9

2H+ + 2e− → H2H+ is

Revolt · Accepted Answer

reduced.

Question 10

Describe the redox reaction. Check all that apply. 2Na(s) + Cl2(g) → 2NaCl(s)

Revolt · Accepted Answer

Sodium atoms are oxidized.; Sodium transfers electrons to chlorine.

Oxidation-Reduction Answers