5 13142.03 Question 2 Requirements • 20 ml syringe with 1 ml divisions, with a circular end on the plunger • balance measuring to 1 g, capable of measuring up to at least 2000 g • vernier caliper • sealant for syringe, e.g. glue Preparation Trap 20 cm3 of air in the syringe and seal the end of the syringe, (e.g. by using glue or heating the end of the syringe). Place the apparatus on the bench. Zero the balance. Action at changeover Rearrange apparatus on the bench. Check that the plunger and syringe are as in original set-up. Zero the balance.