Question

Calculate the following quantity: volume of 1.69 M calcium chloride that must be diluted with water to prepare 477 mL of a 5.70 × 10−2 M chloride ion solution.

Answer 1

use dilution formula

M1*V1 = M2*V2

Here:

M1 is molarity of solution before dilution

M2 is molarity of solution after dilution

V1 is volume of solution before dilution

V2 is volume of solution after dilution

we have:

M1 = 1.69 M

M2 = 0.057 M

V2 = 477.0 mL

we have below equation to be used:

M1*V1 = M2*V2

V1 = (M2 * V2) / M1

V1 = (0.057*477)/1.69

V1 = 16.1 mL

Answer: 16.1 mL