(ii) Complete the following sentences.
84 g of sodium hydrogencarbonate produces … g of sodium carbonate and
… g of water.
4.2 g of sodium hydrogencarbonate produces … g of sodium carbonate.

Ask by Ellis Parsons. in Brunei

Jan 22,2025

Question

(ii) Complete the following sentences.
84 g of sodium hydrogencarbonate produces … g of sodium carbonate and
… g of water.
4.2 g of sodium hydrogencarbonate produces … g of sodium carbonate.

Ask by Ellis Parsons. in Brunei

Jan 22,2025

UpStudy AI · Accepted Answer

To complete the sentences involving the decomposition of sodium hydrogencarbonate (NaHCO₃), we'll use the following balanced chemical equation:

$$ 2 \, \text{NaHCO}_3 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text{O} + \text{CO}_2 $$

**Step 1: Calculate Molar Masses**
- **NaHCO₃ (Sodium Hydrogencarbonate):**  
  - Na: 23 g/mol  
  - H: 1 g/mol  
  - C: 12 g/mol  
  - O₃: 48 g/mol  
  - **Total:** 84 g/mol

- **Na₂CO₃ (Sodium Carbonate):**  
  - Na₂: 46 g/mol  
  - C: 12 g/mol  
  - O₃: 48 g/mol  
  - **Total:** 106 g/mol

- **H₂O (Water):**  
  - H₂: 2 g/mol  
  - O: 16 g/mol  
  - **Total:** 18 g/mol

**Step 2: Stoichiometric Calculations**

1. **For 84 g of NaHCO₃:**
   - **Moles of NaHCO₃:**  
     $$ \frac{84 \, \text{g}}{84 \, \text{g/mol}} = 1 \, \text{mol} $$

- **From the balanced equation:**  
     - 2 mol NaHCO₃ → 1 mol Na₂CO₃  
     - 2 mol NaHCO₃ → 1 mol H₂O

- **Thus:**  
     - **Moles of Na₂CO₃ produced:**  
       $$ \frac{1 \, \text{mol}}{2} = 0.5 \, \text{mol} $$  
       $$ 0.5 \, \text{mol} \times 106 \, \text{g/mol} = 53 \, \text{g} $$

- **Moles of H₂O produced:**  
       $$ \frac{1 \, \text{mol}}{2} = 0.5 \, \text{mol} $$  
       $$ 0.5 \, \text{mol} \times 18 \, \text{g/mol} = 9 \, \text{g} $$

2. **For 4.2 g of NaHCO₃:**
   - **Moles of NaHCO₃:**  
     $$ \frac{4.2 \, \text{g}}{84 \, \text{g/mol}} = 0.05 \, \text{mol} $$

- **Moles of Na₂CO₃ produced:**  
     $$ 0.05 \, \text{mol} \times \frac{1}{2} = 0.025 \, \text{mol} $$  
     $$ 0.025 \, \text{mol} \times 106 \, \text{g/mol} = 2.65 \, \text{g} $$

**Final Completed Sentences:**

1. **84 g of sodium hydrogencarbonate produces _53 g_ of sodium carbonate and _9 g_ of water.**

2. **4.2 g of sodium hydrogencarbonate produces _2.65 g_ of sodium carbonate.**
84 g of sodium hydrogencarbonate produces 53 g of sodium carbonate and 9 g of water. 4.2 g of sodium hydrogencarbonate produces 2.65 g of sodium carbonate.

(ii) Complete the following sentences.
84 g of sodium hydrogencarbonate produces … g of sodium carbonate and
… g of water.
4.2 g of sodium hydrogencarbonate produces … g of sodium carbonate.

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Latest Chemistry Questions

(ii) Complete the following sentences. 84 g of sodium hydrogencarbonate produces … g of sodium carbonate and … g of water. 4.2 g of sodium hydrogencarbonate produces … g of sodium carbonate.

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Answer

Solution

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Latest Chemistry Questions

(ii) Complete the following sentences.
84 g of sodium hydrogencarbonate produces … g of sodium carbonate and
… g of water.
4.2 g of sodium hydrogencarbonate produces … g of sodium carbonate.