Question

2M, 2L aqueous HCl solution is mixed with
3L H20, the molarity of resultant solution is
[NCERT Pg. 23]
(1) 1.34 M
(2) 0.4 M
(3) 0.8 M
(4) 1 M​

Answer 1

Answer:

0.8

Explanation:

M=n/2

2=n/2

n=2×2

n=4 mol

—》Molarity = Moles/ Volume (2+3=5L)

—》Molarity =4/5

—》Molarity =0.8

Answer 2

0.8 M

Molarity is moles per litre of a solution.

Here 2 is the molarity of HCl solution.

i.e., 2M = n/2

So number of moles , n = 2×2 = 4

Now molarity of solution of 2L HCl and 3L H₂O is

M = 4/5

= 0.8 M

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