JEE Main 2019 Chemistry question
25 ml of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2 M aqueous NaOH solution?
Answer: (C)
Solution
HCl = 2 × 3 mmol/25 mL = 0.24 M; 6 mmol NaOH needs 25 mL.