`PCl_3` react will water to give ____ and ____ .

Answer

To solve the question of what products are formed when phosphorus trichloride (PCl₃) reacts with water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are phosphorus trichloride (PCl₃) and water (H₂O).

2. **Write the Reaction**: When PCl₃ reacts with water, it undergoes hydrolysis. The general reaction can be written as:
\[ \text{PCl}_3 + \text{H}_2\text{O} \rightarrow ? \]

3. **Determine the Products**: In the hydrolysis of PCl₃, phosphorus trichloride reacts with water to form phosphorous acid (H₃PO₃) and hydrochloric acid (HCl). The balanced reaction is:
\[ \text{PCl}_3 + 3\text{H}_2\text{O} \rightarrow \text{H}_3\text{PO}_3 + 3\text{HCl} \]

4. **Identify the Final Products**: From the balanced reaction, we can see that the products are:
- Phosphorous acid (H₃PO₃)
- Hydrochloric acid (HCl)

5. **Conclusion**: Therefore, when PCl₃ reacts with water, it produces phosphorous acid (H₃PO₃) and hydrochloric acid (HCl).

### Final Answer:
PCl₃ reacts with water to give **H₃PO₃** and **HCl**.

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