Borax dissolves to give

Options

A. `NaOH + B_2 O_3`
B. `NaOH + B_2 H_`
C. `NaOH + H_3 B O_3`
D. `NaOH + HBO_2`

Answer

To solve the question regarding what borax dissolves to give, we can follow these steps:

### Step 1: Identify the chemical formula of borax
Borax is a white crystalline solid with the chemical formula \( \text{Na}_2\text{B}_4\text{O}_7 \cdot 10\text{H}_2\text{O} \).

### Step 2: Understand the dissolution process
When borax dissolves in water, it undergoes a reaction that produces an alkaline solution.

### Step 3: Write the dissolution reaction
The dissolution of borax in water can be represented by the following chemical equation:
\[ \text{Na}_2\text{B}_4\text{O}_7 \cdot 10\text{H}_2\text{O} + 7\text{H}_2\text{O} \rightarrow 2\text{NaOH} + 4\text{H}_3\text{BO}_3 \]

### Step 4: Analyze the products
From the reaction, we can see that the products formed are:
- Sodium hydroxide (\( \text{NaOH} \))
- Boric acid (\( \text{H}_3\text{BO}_3 \))

### Step 5: Choose the correct answer
Based on the products formed, the correct answer to the question "Borax dissolves to give" is:
**C: \( \text{NaOH} + \text{H}_3\text{BO}_3 \)**

### Summary of the solution:
When borax dissolves in water, it produces sodium hydroxide and boric acid.

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