DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ1.a.i
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.sl.TZ1.a.i |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | a.i | Adapted from | N/A |
a.i.
[Maximum mark: 1]
18M.3.sl.TZ1.a.i
Excess stomach acid can be counteracted by a range of medications.
An antacid tablet contains 680 mg of calcium carbonate, CaCO3, and 80 mg of magnesium carbonate, MgCO3.
State the equation for the reaction of magnesium carbonate with hydrochloric acid.
[1]
Markscheme
MgCO3(s) + 2HCl(aq) → CO2(g) + H2O(l) + MgCl2(aq)
Do not accept “H2CO3”.
[1 mark]
