Number of P–OH bonds is sodium dihydrogen pyrophosphate –

Options

A. 4
B. 3
C. 2
D. 0

Explanation

To determine the number of P–OH bonds in sodium dihydrogen pyrophosphate, we can follow these steps:

### Step 1: Understand the Structure of Sodium Dihydrogen Pyrophosphate
Sodium dihydrogen pyrophosphate has the chemical formula Na2H2P2O7. It consists of two phosphate groups (P2O7) and two sodium ions (Na+).

### Step 2: Draw the Structure
The structure of sodium dihydrogen pyrophosphate can be represented as follows:
- Each phosphate group (PO4) has a phosphorus atom (P) bonded to four oxygen atoms (O).
- In the case of pyrophosphate, two phosphate groups are linked together, sharing one oxygen atom.

### Step 3: Identify the P–OH Bonds
In the structure of sodium dihydrogen pyrophosphate:
- Each phosphate group has two hydroxyl (OH) groups.
- Therefore, we need to count the P–OH bonds.

### Step 4: Count the P–OH Bonds
In sodium dihydrogen pyrophosphate:
- There are two P–OH bonds from the two hydroxyl groups attached to the phosphorus atoms.

### Conclusion
Thus, the total number of P–OH bonds in sodium dihydrogen pyrophosphate is **2**.

### Final Answer
The number of P–OH bonds in sodium dihydrogen pyrophosphate is **2**.

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