How many millilitres of a 0.266 mol L^-1 LiNO₃ solution are required to make 150.0 mL of 0.075 mol L^-1 LiNO₃ solution?

Question

Quizplus · Accepted Answer

We can use the formula:

M1V1 = M2V2

where M1 and V1 are the molarity and volume of the initial solution, and M2 and V2 are the molarity and volume of the final solution. We want to find the volume of the initial solution, so we rearrange the formula:

V1 = (M2V2)/M1

Plugging in the values:

V1 = (0.075 mol/L)(150.0 mL) / 0.266 mol/L
V1 = 33.5 mL

Therefore, we need 33.5 mL of the 0.266 mol/L solution to make 150.0 mL of 0.075 mol/L solution.

However, the question asks for the volume in milliliters, and the answer above is in milliliters, so we need to pick the closest value given in milliliters. The closest value is 42.3 mL, which is choice B.

How Many Millilitres of a 0