What is the colour of ppt. formed when sodium hydroxide solution is added to calcium salt ?

Options

A. Green
B. White
C. Brown
D. Red

Explanation

To determine the color of the precipitate formed when sodium hydroxide solution is added to calcium salt, we can follow these steps:

### Step 1: Identify the Reactants
We are adding sodium hydroxide (NaOH) to a calcium salt. A common calcium salt is calcium chloride (CaCl₂).

### Step 2: Write the Chemical Reaction
The reaction between sodium hydroxide and calcium chloride can be represented as follows:

\[ \text{CaCl}_2 (aq) + 2 \text{NaOH} (aq) \rightarrow \text{Ca(OH)}_2 (s) + 2 \text{NaCl} (aq) \]

### Step 3: Identify the Products
From the reaction, we can see that calcium hydroxide (Ca(OH)₂) is formed as a precipitate, along with sodium chloride (NaCl) in solution.

### Step 4: Determine the Color of the Precipitate
Calcium hydroxide (Ca(OH)₂) is known to form a white precipitate when it is produced in this reaction.

### Conclusion
The color of the precipitate formed when sodium hydroxide solution is added to calcium salt (specifically calcium chloride) is **white**.

### Final Answer
The color of the precipitate formed is **white**.

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