Question

What mass of water would be produced if 1.5 g of ethanoic acid was reacted completely with sodium hydroxide (3 marks)

Answer 1

Mass of water : 0.45 g

Further explanation

Given

1.5 g ethanoic acid

Required

Mass of water

Solution

Reaction

CH₃COOH + NaOH ⇒H₂O + CH₃COONa

mol CH₃COOH(MW=60 g/mol) :

= mass : MW

= 1.5 : 60

= 0.025

mol H₂O from the equation :

= 0.025(mol ratio CH₃COOH : H₂O= 1 : 1)

Mass of water :

= mol x MW water

= 0.025 x 18 g/mol

= 0.45 g