The colour of the precipitate formed when barium chloride solution is mixed with sodium sulphate solution is

Options

A. blue
B. black
C. white
D. green

Answer

To determine the color of the precipitate formed when barium chloride solution is mixed with sodium sulfate solution, we can follow these steps:

### Step 1: Identify the Reactants
We start with two solutions:
- Barium chloride (BaCl₂)
- Sodium sulfate (Na₂SO₄)

### Step 2: Write the Chemical Reaction
When barium chloride and sodium sulfate are mixed, a double displacement reaction occurs. The chemical equation for this reaction can be written as:
\[ \text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + 2\text{NaCl} \]

### Step 3: Identify the Products
From the reaction, we can see that barium sulfate (BaSO₄) and sodium chloride (NaCl) are formed.

### Step 4: Determine the Precipitate
Barium sulfate (BaSO₄) is known to be insoluble in water, which means it will precipitate out of the solution.

### Step 5: Identify the Color of the Precipitate
Barium sulfate (BaSO₄) is characterized by its white color. Therefore, the precipitate formed when barium chloride is mixed with sodium sulfate is white.

### Final Answer
The color of the precipitate formed when barium chloride solution is mixed with sodium sulfate solution is **white**.

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