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For the test of halides, the soda extrac...

For the test of halides, the soda extract is acidified with :

A

dil. `H_(2)SO_(4)`

B

dil. `HNO_(3)`

C

dil. `HCl`

D

any of the three

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The correct Answer is:
To solve the question regarding the acidification of soda extract for the test of halides, let's break down the steps: ### Step-by-Step Solution: 1. **Understanding Soda Extract**: - The soda extract refers to the solution obtained by treating a sample with sodium carbonate (Na2CO3). This extract contains carbonate ions (CO3^2-). 2. **Identifying the Problem**: - The presence of carbonate ions can interfere with the halide tests. Therefore, it is essential to remove or convert these carbonate ions before proceeding with the halide tests. 3. **Choosing the Acid**: - We need to acidify the soda extract to neutralize the carbonate ions. The options provided are: - Dilute H2SO4 (sulfuric acid) - Dilute HNO3 (nitric acid) - Dilute HCl (hydrochloric acid) - Any of the three 4. **Reaction with Acids**: - When sodium carbonate reacts with an acid, it produces carbon dioxide (CO2), water (H2O), and a salt. - The reaction with nitric acid (HNO3) can be represented as: \[ \text{Na}_2\text{CO}_3 + 2 \text{HNO}_3 \rightarrow 2 \text{NaNO}_3 + \text{CO}_2 + \text{H}_2\text{O} \] - This shows that the carbonate ion is converted into carbon dioxide and water, effectively removing it from the solution. 5. **Conclusion**: - Since the carbonate ions are destroyed by the reaction with dilute HNO3, this acid is the most suitable choice for acidifying the soda extract for the halide test. - Therefore, the answer to the question is **dilute HNO3**.
To solve the question regarding the acidification of soda extract for the test of halides, let's break down the steps: ### Step-by-Step Solution: 1. **Understanding Soda Extract**: - The soda extract refers to the solution obtained by treating a sample with sodium carbonate (Na2CO3). This extract contains carbonate ions (CO3^2-). 2. **Identifying the Problem**: ...
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