To identify the gas used to sterilize water, which is commonly chlorine gas (Cl₂), you can perform a simple test.

1. **Test Method**:
- Bubbling the gas through a solution of potassium iodide (KI) can help identify chlorine. When chlorine gas is present, it will react with potassium iodide.

2. **Expected Result**:
- The reaction between chlorine gas and potassium iodide will produce a brown solution due to the formation of iodine (I₂). This color change indicates the presence of chlorine gas.

**Test Result**: The appearance of a brown color in the solution confirms the presence of chlorine gas, which is commonly used for water sterilization.

Question

To identify the gas used to sterilize water, which is commonly chlorine gas (Cl₂), you can perform a simple test.

1. **Test Method**: 
   - Bubbling the gas through a solution of potassium iodide (KI) can help identify chlorine. When chlorine gas is present, it will react with potassium iodide.

2. **Expected Result**: 
   - The reaction between chlorine gas and potassium iodide will produce a brown solution due to the formation of iodine (I₂). This color change indicates the presence of chlorine gas.

**Test Result**: The appearance of a brown color in the solution confirms the presence of chlorine gas, which is commonly used for water sterilization.

Knowee AI · Accepted Answer

To identify the gas used to sterilize water, which is commonly chlorine gas (Cl₂), you can perform a simple test.

1. **Test Method**: 
   - Bubbling the gas through a solution of potassium iodide (KI) can help identify chlorine. When chlorine gas is present, it will react with potassium iodide.

2. **Expected Result**: 
   - The reaction between chlorine gas and potassium iodide will produce a brown solution due to the formation of iodine (I₂). This color change indicates the presence of chlorine gas.

**Test Result**: The appearance of a brown color in the solution confirms the presence of chlorine gas, which is commonly used for water sterilization.

Describe a test to identify the gas used to sterilise water. [2 marks] Test Result

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Describe a test to identify the gas used to sterilise water. [2 marks]

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