Question

3. How many liters of water need to be added to

0.84 moles of KI to make a 0.20 M solution of KI?

Answer 1

Answer: 4.2 Liters

Step-by-step explanation:

Molarity can be calculated by dividing the moles of a substance number of liters of solution

Equation:

.2M = .84 mol / x liters

Convert to mL:

200/1000 = 840/ x

Solve for x:

200x = 840000

x = 4200 ml

Convert back to liters:

4200 ml = 4.2 L