When copper nitrate is strongly heated, the compound obtained is

Options

A. Copper nitrite
B. Copper
C. Copper nitride
D. Copper oxide

Answer

To determine the compound obtained when copper nitrate is strongly heated, we can follow these steps:

### Step 1: Identify the chemical formula of copper nitrate.
Copper nitrate has the chemical formula \( \text{Cu(NO}_3\text{)}_2 \).

**Hint:** Remember that copper nitrate consists of copper ions and nitrate ions. The subscript indicates that there are two nitrate ions for each copper ion.

### Step 2: Understand the thermal decomposition of copper nitrate.
When copper nitrate is subjected to strong heating, it undergoes thermal decomposition. This means it breaks down into simpler substances.

**Hint:** Thermal decomposition reactions often produce a metal oxide, nitrogen oxides, and oxygen.

### Step 3: Write the balanced equation for the decomposition.
The balanced chemical equation for the decomposition of copper nitrate is:
\[ 2 \text{Cu(NO}_3\text{)}_2 \rightarrow 2 \text{CuO} + 4 \text{NO}_2 + \text{O}_2 \]
From this equation, we can see that copper oxide (\( \text{CuO} \)), nitrogen dioxide (\( \text{NO}_2 \)), and oxygen (\( \text{O}_2 \)) are produced.

**Hint:** Pay attention to the stoichiometry in the balanced equation; it tells you how many molecules of each substance are involved.

### Step 4: Identify the main compound formed.
From the decomposition products, the main compound obtained from the heating of copper nitrate is copper oxide (\( \text{CuO} \)).

**Hint:** Focus on the primary product of interest, which is often the metal oxide formed during decomposition.

### Conclusion
Thus, the compound obtained when copper nitrate is strongly heated is copper oxide (\( \text{CuO} \)).

**Final Answer:** \( \text{CuO} \)

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