Question

Write down the concentration of the following solution in g/L and mol/L. 

3g CH₃COOH in 100ml solution

Answer 1

Given:

Mass of solute (CH₃COOH) = 3 g

Volume of solution = 100 mL = 0.1 L

Molar mass of CH₃COOH = 60 g/mol

Concentration in g/L:

Concentration (g/L) = `"Mass of solute (g)"/"Volume of solution (L)"`

`= 3/0.1 `

= 30 g/L

Concentration in mol/L (Molarity):

Molarity (M) = `"Moles of solute"/"Volume of solution in L"`

Moles of CH₃COOH = `3/60`

= 0.05 mol

Molarity `= 0.05/0.1`

= 0.5 mol/L