Answer to Question #148139 in Chemistry for rae

Question

What mass of NaCl is needed to produce 500 mL of a 2.0 mol/L solution?

Answer 1

Solution:

A 2.0 M solution is 2.0 moles per liter.

Therefore, 0.5 L would contain:

(2.0 mol × 0.5 L) / 1.0 L = 1.0 mol

The molar mass of NaCl is 58.44 g/mol

So, one mole of NaCl weighs 58.44 g.

Hence, you would need:

1.0 mol × 58.44 g = 58.44 g.

Answer: 58.44 g of NaCl is needed.