Question

What mass of NaOH is needed to make 500mL of 4M solution

Answer 1

Answer:

80.0 grams NaOH

Explanation:

500 mL = 0.500 L

M = moles / liters

4 M =    x moles / 0.500 L

Multiply both sides by 0.500 L

2 moles = x

Convert moles to grams

2 moles NaOH x (39.998 grams NaOH / 1 mole) = 80.0 grams NaOH