Practical: making and testing the smell of some esters in the lab

2 marks · Easy

During an esterification experiment, a student collects a layer of ester with a volume of 0.7 cm³. If the density of the ester is 0.91 g/cm³, calculate the mass of ester produced. Give your answer to 2 decimal places.

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Show answer

0.64 g (±0.01)

Also accept: 0.64

Common mistakes: forgetting to use correct units; using the wrong density

Show mark scheme and worked solution

Marking points

M1 · 1 mark · Uses the correct formula: mass = volume × density.

A1 · 1 mark · Final answer = 0.64 g to 2 decimal places. (follow-through)

Worked solution

Mass = volume × density = 0.7 cm³ × 0.91 g/cm³ = 0.637 g

Rounded to 2 decimal places: 0.64 g