Question

What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?

Answer 1

Answer:

• Volume = 2.0 liter of 1.5 M solution of KOH

Explanation:

1) Data:

a) Solution: KOH

b) M = 1.5 M

c) n = 3.0 mol

d) V = ?

2) Formula:

Molarity is a unit of concentration, defined as number of moles of solute per liter of solution:

• M = n / V in liter

3) Calculations:

• Solve for n: M = n / V ⇒ V = n / M

• Substitute values: V = 3.0 mol / 1.5 M = 2.0 liter

You must use 2 significant figures in your answer: 2.0 liter.