Question

use the following reaction to answer the questions below: ca + n₂ -> ca₃n₂ which element was reduced calcium? which element was oxidized nitrogen? which element is the oxidizing agent? nitrogen ion which element is the reducing agent? calcium

Explanation:

Step1: Determine oxidation - states

In the reactants, calcium ($Ca$) has an oxidation - state of 0 and nitrogen in $N_2$ has an oxidation - state of 0. In the product $Ca_3N_2$, calcium has an oxidation - state of + 2 and nitrogen has an oxidation - state of - 3.

Step2: Identify reduction

Reduction is the gain of electrons and a decrease in oxidation state. Nitrogen goes from 0 to - 3, so nitrogen is reduced.

Step3: Identify oxidation

Oxidation is the loss of electrons and an increase in oxidation state. Calcium goes from 0 to + 2, so calcium is oxidized.

Step4: Identify oxidizing and reducing agents

The oxidizing agent is the substance that causes oxidation and is itself reduced. Nitrogen is the oxidizing agent (in the form of $N_2$, not nitrogen ion). The reducing agent is the substance that causes reduction and is itself oxidized. Calcium is the reducing agent.

Answer:

Which element was reduced: nitrogen
Which element was oxidized: calcium
Which element is the oxidizing agent: nitrogen
Which element is the reducing agent: calcium