Chemistry 2 Flashcards


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1

What is the coefficient for OH(aq) when SO3 2−(aq) + MnO4 (aq) → SO4 2−(aq) + Mn2+(aq) is balanced in basic aqueous solution?

6

3

2

1

6

2

What is the coefficient for H2O(l) when S2−(aq) + NO3 (aq) → S(s) + NO(g) is balanced in acidic aqueous solution?

4

2

1

3

4

3

What is the coefficient for H2O(l) when MnO4 (aq) + Fe2+(aq)→ Mn2+(aq) + Fe3+(aq) is balanced in acidic aqueous solution?

4

2

6

1

4

4

What is the coefficient for H2O(l) when Sn2+(aq) + IO3 (aq) → Sn4+(aq) + I(aq) is balanced in acidic aqueous solution?

3

2

1

4

3

5

What is the coefficient for H2O(l) when PbO2(s) + I2(s) → Pb2+(aq) + IO3 (aq) is balanced in acidic aqueous solution?

4

2

10

6

4

6

What is the coefficient for H2O(l) when SO4 2−(aq) + Br2(l) → S2O3 2−(aq) + BrO3 (aq) is balanced in acidic aqueous solution?

1

6

12

24

1

7

What is the coefficient for OH(aq) when SO4 2−(aq)+ Br2(l) → S2O3 2−(aq) + BrO3 (aq) is balanced in basic aqueous solution?

2

1

3

4

2

8

What is the coefficient for H2O(l) when SO3 2−(aq) + MnO4 (aq) → SO4 2−(aq) + Mn2+(aq) is balanced in acidic aqueous solution?

3

1

2

6

3

9

What is the coefficient for OH(aq) when PbO2(s) + I2(s) → Pb2+(aq) + IO3 (aq) is balanced in basic aqueous solution?

8

6

4

2

8

10

What is the coefficient for OH(aq) when MnO4 (aq) + Fe2+(aq) → Mn2+(aq) + Fe3+(aq) is balanced in basic aqueous solution?

8

6

4

2

8

11

How many electrons are needed to balance each of the following half-reactions?

Reduction half-reaction: Fe3+(aq) + _e → Fe(s)

Oxidation half-reaction: Al(s) → Al3+(aq)+ _e

Overall reaction: Fe3+(aq) + Al(s) → Fe(s) + Al3+(aq)

3

0

6

2

3

12

What is the coefficient for OH(aq) when S2−(aq) + NO3 (aq) → S(s) + NO(g) is balanced in basic aqueous solution?

8

4

6

2

8