`BaSO_(4) darr+Na_(2)CO_(3) to BaCO_(3)darr+Na_(2)SO_(4)`

Options

A. For precipitate formation formation reaction
B. For precipitate dissolution reaction
C. For precipitate exchange reaction
D. For no reaction

Answer

To analyze the given reaction \( \text{BaSO}_4 + \text{Na}_2\text{CO}_3 \rightarrow \text{BaCO}_3 + \text{Na}_2\text{SO}_4 \), we will follow these steps:

### Step 1: Identify the Reactants and Products
The reactants in this reaction are:
- Barium sulfate (\( \text{BaSO}_4 \))
- Sodium carbonate (\( \text{Na}_2\text{CO}_3 \))

The products formed are:
- Barium carbonate (\( \text{BaCO}_3 \))
- Sodium sulfate (\( \text{Na}_2\text{SO}_4 \))

### Step 2: Determine the State of the Compounds
Next, we need to identify the states of the compounds:
- \( \text{BaSO}_4 \) is a solid precipitate (indicated by the downward arrow).
- \( \text{Na}_2\text{CO}_3 \) is soluble in water (aqueous).
- \( \text{BaCO}_3 \) is also a solid precipitate (indicated by the downward arrow).
- \( \text{Na}_2\text{SO}_4 \) is soluble in water (aqueous).

### Step 3: Analyze the Type of Reaction
In this reaction, we have:
- A solid precipitate (\( \text{BaSO}_4 \)) reacting with a soluble compound (\( \text{Na}_2\text{CO}_3 \)).
- The reaction produces another solid precipitate (\( \text{BaCO}_3 \)) and a soluble compound (\( \text{Na}_2\text{SO}_4 \)).

This indicates that there is an exchange of ions between the reactants, leading to the formation of new precipitates.

### Step 4: Classify the Reaction
Given the characteristics of the reaction:
- Precipitate formation occurs as \( \text{BaSO}_4 \) and \( \text{BaCO}_3 \) are both solid precipitates.
- The reaction involves the exchange of sulfate and carbonate ions between the reactants and products.

Thus, this reaction can be classified as a **precipitate exchange reaction**.

### Conclusion
The correct classification of the reaction \( \text{BaSO}_4 + \text{Na}_2\text{CO}_3 \rightarrow \text{BaCO}_3 + \text{Na}_2\text{SO}_4 \) is a **precipitate exchange reaction**.

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