Question

the volumes of 1 molar HCL and 5 molar HCL to be mixed to get 4l of 3.5 molar HCL solution​

Answer 1

Answer: 2l volumes of each.

Explanation: Assume x litres of moles are mixed with (4-x) litres since total vol. is 4 litres.

Now, applying formula,

M1V1 + M2V2 = MV

1×x + 5(4-x) = 3.5×4

Solving this, we get x=2 litres.

Hope ur answer is cleared.