Benzoic acid is a monobasic acid. When 1.22 g of its pure sample are dissolved in water and titrated against base, 50 ml of 0.2 M NaOH are used up. Calculate the molar mass of benzoic acid.

Explanation

To calculate the molar mass of benzoic acid from the given data, we can follow these steps:

### Step 1: Understand the given data
- Mass of benzoic acid (m) = 1.22 g
- Volume of NaOH used (V) = 50 mL = 0.050 L (conversion from mL to L)
- Molarity of NaOH (C) = 0.2 M

### Step 2: Calculate the number of equivalents of NaOH used
...