Chapter 13, Problem 97A

(a)

Interpretation Introduction

Interpretation: Between magnesium and mercury, the metal which is high in the activity series is to be identified.

Concept introduction:

An activity series is a form of element ordering system that rates each element's reactivity in relation to other elements.

Answer to Problem 97A

Magnesium

Explanation of Solution

The activity series is a list of typical reduction potentials with the likelihood of compounds to be reduced listed in descending order. Metals towards the top of the series can produce positive ions more easily by losing electrons. Now, the above reaction is balanced.

Magnesium lose electrons more easily than mercury.

Thus, magnesium is higher in the activity series than mercury.

(b)

Interpretation Introduction

Interpretation: Between magnesium and mercury, the metal which is high in the activity series is to be identified.

Concept introduction:

An activity series is a form of element ordering system that rates each element's reactivity in relation to other elements.

Answer to Problem 97A

Lithium

Explanation of Solution

The activity series is a list of typical reduction potentials with the likelihood of compounds to be reduced listed in descending order. Metals towards the top of the series can produce positive ions more easily by losing electrons. Now, the above reaction is balanced.

Lithium loses electrons more easily than potassium.

Thus, lithium is higher in the activity series than potassium.