Equilibrium Question 450
Question: When $ 100ml $ of $ M/10NaOH $ solution and $ 50ml $ of $ M/5HCl $ solution are mixed, the $ pH $ of resulting solution would be [RPMT 1997]
Options:
A) 0
B) 7
C) Less than 7
D) More than 7
Show Answer
Answer:
Correct Answer: B
Solution:
100 ml of $ \frac{M}{10} $ NaOH = 50ml of $ \frac{M}{5} $ NaOH.
They exactly neutralise 50 ml $ \frac{N}{5} $ HCl. Hence pH of resulting solution = 7.
