Question

. In which ratio of volume 0.4 M HCl and 0.9 M HCl are
to be mixed such that the concentration of the resultant
solution becomes 0.7 M?
(1) 4:9
(2) 2:3
(3) 1:1
(4) 3:2
C
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Answer 1

Answer:

in which ratio of volumes 0.4 M HCl and 0.9 M HCl are to be mixed such that the concentration of the resultant solution becomes 0.7 M ? ⇒0.3x=0.2y⇒xy=0.20.3⇒=0.20.3⇒xy=2:3.

Explanation: