Some Basic Concepts Of Chemistry Question 234

Question: Hydrochloric acid solutions A and B have concentration of 0.5 N and 0.1 N respectively. The volume of solutions A and B required to make 2 litres of 0.2 N hydrochloric are [KCET 1993]

Options:

A) 0.5 l of A + 1.5 l of B

B) 1.5 l of A + 0.5 l of B

C) 1.0 l of A + 1.0 l of B

D) 0.75 l of A + 1.25 l of B

Show Answer

Answer:

Correct Answer: A

Solution:

$ NV=N _1V _1+N _2V _2 $

$ 0.2\times 2=0.5x+0.1(2-x) $

$ 0.4=0.5x+0.2-0.1x $

$ 0.2=0.4x $

$ x=\frac{1}{2}L=0.5L $



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