Answer to Question #297034 in Chemistry for Zoe

Question

How many millimoles of KSCN is in 750 mL of 3.25×10-3 M solution?

Answer 1

Solution:

Moles of solute = Molarity × Liters of solution

Hence,

Moles of KSCN = (3.25×10^-3 M) × (750 mL) × (1 L / 1000 mL) = 0.0024375 mol KSCN

Millimoles of KSCN = (0.0024375 mol) × (1000 mmol / 1 mol) = 2.4375 mmol = 2.44 mmol

Answer: 2.44 millimoles of KSCN