Question
calculate the mass of zinc chloride produced from 9.5g of zinc oxide
Answers
GPT-4o mini
To calculate the mass of zinc chloride produced from zinc oxide, we need to follow these steps:
1. **Write the balanced chemical equation** for the reaction between zinc oxide (ZnO) and hydrochloric acid (HCl) to form zinc chloride (ZnCl₂) and water (H₂O):
\[
\text{ZnO} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2\text{O}
\]
2. **Molar masses** involved:
- The molar mass of zinc oxide (ZnO) = 65.38 g/mol (Zn) + 16.00 g/mol (O) = 81.38 g/mol
- The molar mass of zinc chloride (ZnCl₂) = 65.38 g/mol (Zn) + 2 × 35.45 g/mol (Cl) = 136.28 g/mol
3. **Calculate moles of zinc oxide**:
\[
\text{Moles of ZnO} = \frac{\text{mass}}{\text{molar mass}} = \frac{9.5 \text{ g}}{81.38 \text{ g/mol}} \approx 0.1166 \text{ moles ZnO}
\]
4. **Using the stoichiometry from the balanced equation**:
From the reaction, 1 mole of ZnO produces 1 mole of ZnCl₂.
Therefore, the moles of ZnCl₂ produced will also be approximately 0.1166 moles.
5. **Calculate the mass of zinc chloride (ZnCl₂)** produced:
\[
\text{Mass of ZnCl₂} = \text{moles} \times \text{molar mass} = 0.1166 \text{ moles} \times 136.28 \text{ g/mol} \approx 15.87 \text{ g}
\]
Thus, the mass of zinc chloride produced from 9.5 g of zinc oxide is approximately **15.87 grams**.
1. **Write the balanced chemical equation** for the reaction between zinc oxide (ZnO) and hydrochloric acid (HCl) to form zinc chloride (ZnCl₂) and water (H₂O):
\[
\text{ZnO} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2\text{O}
\]
2. **Molar masses** involved:
- The molar mass of zinc oxide (ZnO) = 65.38 g/mol (Zn) + 16.00 g/mol (O) = 81.38 g/mol
- The molar mass of zinc chloride (ZnCl₂) = 65.38 g/mol (Zn) + 2 × 35.45 g/mol (Cl) = 136.28 g/mol
3. **Calculate moles of zinc oxide**:
\[
\text{Moles of ZnO} = \frac{\text{mass}}{\text{molar mass}} = \frac{9.5 \text{ g}}{81.38 \text{ g/mol}} \approx 0.1166 \text{ moles ZnO}
\]
4. **Using the stoichiometry from the balanced equation**:
From the reaction, 1 mole of ZnO produces 1 mole of ZnCl₂.
Therefore, the moles of ZnCl₂ produced will also be approximately 0.1166 moles.
5. **Calculate the mass of zinc chloride (ZnCl₂)** produced:
\[
\text{Mass of ZnCl₂} = \text{moles} \times \text{molar mass} = 0.1166 \text{ moles} \times 136.28 \text{ g/mol} \approx 15.87 \text{ g}
\]
Thus, the mass of zinc chloride produced from 9.5 g of zinc oxide is approximately **15.87 grams**.