passwella.
Menu

JAMB Chemistry 2008 Question 20

Question 20

Volumetric Analysis

0.05 mol dm−3 HCl is neutralized by 25cm3 NaOH. If the volume of acid used is 32.00cm3, what is the concentration of the base?

  1. A.0.016 mol dm−3
  2. B.0.032 mol dm−3
  3. C.0.0… mol dm−3
  4. D.0.064 mol dm−3.
Show the answer and explanation

Answer: D (0.064 mol dm−3.)

Explanation

HCl and NaOH react 1 : 1, so CB = 0.05 × 32/25 = 0.064 mol dm−3.