1. Write a balanced chemical equation for the following reaction in acidic medium:

[tex]\[ ClO_3^- + SO_2 \rightarrow SO_4^{2-} + Cl^- \][/tex]

2. What mass of citric acid is produced from exactly 1 metric ton [tex]\((1000 \times 10^3 \, \text{kg})\)[/tex]?



Answer :

### Step 1: Writing the Balanced Chemical Equation

In an acidic medium, the reaction between chlorate ions (ClO3-) and sulfur dioxide (SO2) to produce sulfate ions (SO42-) and chloride ions (Cl-) can be balanced as follows:

1. Write the unbalanced equation:
[tex]\[ \text{ClO}_3^- + \text{SO}_2 \rightarrow \text{SO}_4^{2-} + \text{Cl}^- \][/tex]

2. Identify oxidation states and balance the redox reaction:
- Oxidation half-reaction:
[tex]\[ \text{SO}_2 \rightarrow \text{SO}_4^{2-} + 2\text{e}^- \][/tex]

- Reduction half-reaction:
[tex]\[ \text{ClO}_3^- + 6\text{H}^+ + 6\text{e}^- \rightarrow \text{Cl}^- + 3\text{H}_2\text{O} \][/tex]

3. Balance the electrons in the half-reactions:
[tex]\[ \text{ClO}_3^- + 6\text{H}^+ + 6\text{e}^- \rightarrow \text{Cl}^- + 3\text{H}_2\text{O} \][/tex]
[tex]\[ 3\text{SO}_2 \rightarrow 3\text{SO}_4^{2-} + 6\text{e}^- \][/tex]

4. Combine the balanced half-reactions (ensure electrons cancel):
[tex]\[ \text{ClO}_3^- + 3\text{SO}_2 + 6\text{H}^+ \rightarrow 3\text{SO}_4^{2-} + \text{Cl}^- + 3\text{H}_2\text{O} \][/tex]

5. Simplify if necessary:
[tex]\[ \text{ClO}_3^- + 3\text{SO}_2 + \text{H}_2\text{O} \rightarrow 3\text{SO}_4^{2-} + 2\text{H}^+ + \text{Cl}^- \][/tex]

Therefore, the balanced equation in an acidic medium is:
[tex]\[ \text{ClO}_3^- + 3\text{SO}_2 + \text{H}_2\text{O} \rightarrow 3\text{SO}_4^{2-} + 2\text{H}^+ + \text{Cl}^- \][/tex]

### Step 2: Calculating the Mass of Citric Acid Produced

We need to find the mass of citric acid (C6H8O7) produced from exactly 1 metric ton (1000 × 103 kg).

1. Understand the relation and conversion factors:
- Molecular weight of citric acid (C6H8O7) is approximately 192.12 g/mol.

2. Convert metric ton to grams:
[tex]\[ 1 \text{ metric ton} = 1000 \times 10^3 \text{ kg} = 10^6 \text{ g} \][/tex]

3. Calculate the moles of citric acid produced:
[tex]\[ \text{Moles of citric acid} = \frac{10^6 \text{ g}}{192.12 \text{ g/mol}} \approx 5205.08 \text{ mol} \][/tex]

Thus, the mass of citric acid produced from exactly 1 metric ton is:
[tex]\[ \approx 5205.08 \text{ mol} \][/tex]

This provides us with a clear and detailed solution for the given problem.

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