Question

To produce 5 mL of a 0.4 M solution of KI, what volume in mL of KI stock solution is required? The concentration of KI stock solution is 235 g/L. Round your answer to the nearest tenth. KI = 166 g/mol

a. 0.9 mL
b. 1.2 mL
c. 2.3 mL
d. 3.6 mL

Answer 1

To produce a 0.4 M solution of KI with a volume of 5 mL, approximately 8.5 mL of KI stock solution is required.

Step-by-step explanation:

To determine the volume of KI stock solution required to produce a 0.4 M solution of KI with a volume of 5 mL, we can use the formula:

(C1)(V1) = (C2)(V2)

Where C1 is the concentration of the stock solution, V1 is the volume of the stock solution, C2 is the desired concentration, and V2 is the desired volume.

Plugging in the given values, we have:

(0.4 M)(5 mL) = (0.235 M)(V2)

V2 = (0.4 M)(5 mL) / (0.235 M) ≈ 8.5 mL

Rounded to the nearest tenth, the volume of KI stock solution required is 8.5 mL.