Question

A 1.0 M NaOH reacts with 20 mL of HCl solution for complete neutralisation. The molarity of HCl solution is?

• A. 0.99
• B. 0.98
• C. 0.059
• D. 0.0099

Hint:

For neutralisation reactions, use the equation \( M_1 V_1 = M_2 V_2 \) to calculate unknown concentrations.

Answer 1

The Correct Option is C

To find the molarity of the HCl solution, we use the formula for neutralisation reactions: \[ M_1 V_1 = M_2 V_2 \] where \( M_1 \) and \( V_1 \) are the molarity and volume of NaOH, and \( M_2 \) and \( V_2 \) are the molarity and volume of HCl. After substituting the known values, the molarity of HCl is calculated.