Which acid is formed by `P_(2)O_(3)`

Options

A. `H_(3)PO_(4)`
B. `H_(3)PO_(3)`
C. `HPO_(3)`
D. `H_(4)P_(2)O_(7)`

Explanation

To determine which acid is formed by \( P_2O_3 \), we can follow these steps:

### Step 1: Identify \( P_2O_3 \)
- \( P_2O_3 \) is known as phosphorus trioxide. It is a chemical compound consisting of phosphorus and oxygen.

### Step 2: React \( P_2O_3 \) with Water
- When phosphorus trioxide reacts with water (\( H_2O \)), it forms an acid. The reaction can be represented as follows:
\[ P_2O_3 + 3H_2O \rightarrow 2H_3PO_3 \]

### Step 3: Identify the Product
- The product of this reaction is \( H_3PO_3 \), which is known as phosphorous acid.

### Step 4: Determine the Amount of Acid Formed
- From the reaction, we see that 1 mole of \( P_2O_3 \) yields 2 moles of \( H_3PO_3 \). Therefore, the acid formed is phosphorous acid, and the balanced equation shows that 2 moles of \( H_3PO_3 \) are produced.

### Conclusion
- The acid formed by \( P_2O_3 \) is \( H_3PO_3 \) (phosphorous acid).

### Final Answer
- The acid formed by \( P_2O_3 \) is \( H_3PO_3 \).

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