Experiment 1: Determination of formula unit of a compound

Experiment 1: Determination of formula unit of a compound

Week 1 (4/8/2021)

9.00am-11.00am

E1P3

Multiple Choice

Why should we press the "TARE" button before taking the zinc powder?

• To make sure the accuracy of the analytical balance

• To make the mass of the content on the analytical balance become zero

• To switch on the analytical balance

Open Ended

Why the crucible MUST be covered during the cooling process?

The product after cooling down at room temperature

Open Ended

Why we need to reheat the crucible until the difference in mass does not exceed 0.02 g?