Analytical Chemistry Question 257
Question: 10 ml of concentrated $ HCl $ were diluted to 1 litre. 20 ml of this diluted solution required 25 ml of 0.1 N sodium hydroxide solution for complete neutralization, the normality of the concentrated hydrochloric acid will be
Options:
A) 8.0
B) 9.5
C) 12.5
D) 15.0
Show Answer
Answer:
Correct Answer: C
Solution:
$ \underset{N_1V_1=}{\mathop{HCl}}\underset{N_2V_2}{\mathop{NaOH}} $
$ N_1\times 20ml=0.1\times 25 $
$ N_1=\frac{0.1\times 25}{20}=0.125 $ . If one litre HCl present in 0.125 Therefore in 10 ml $ \frac{0.125}{1000}\ \times \ 10 $ = 12.5 The normality of conc. HCl is 12.5N.
BETA
