Sodium carbonate and mixture are taken in ___ ratio while perparing sodium carbonate extract

Answer

To answer the question regarding the ratio of sodium carbonate to the mixture while preparing sodium carbonate extract, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Purpose of Sodium Carbonate Extract**:
- Sodium carbonate extract is used for the qualitative analysis of anions, especially when the salt is insoluble in water.

2. **Identifying the Components**:
- The two components involved in the preparation of the sodium carbonate extract are sodium carbonate and the mixture (which contains the salt whose anions we want to analyze).

3. **Determining the Ratio**:
- The standard practice in qualitative analysis is to take sodium carbonate and the mixture in a specific ratio.

4. **Stating the Ratio**:
- According to the information provided, the correct ratio of sodium carbonate to the mixture is 3:1. This means that for every 1 part of the mixture, 3 parts of sodium carbonate are used.

5. **Filling in the Blank**:
- Therefore, the completed statement is: "Sodium carbonate and mixture are taken in the ratio of 3:1 while preparing sodium carbonate extract."

### Final Answer:
Sodium carbonate and mixture are taken in the ratio of **3:1** while preparing sodium carbonate extract.

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