DP Chemistry (last assessment 2024)
Question 18M.2.sl.TZ2.1a
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.2.sl.TZ2.1a |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Calculate | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
18M.2.sl.TZ2.1a
A student determined the percentage of the active ingredient magnesium hydroxide, Mg(OH)2, in a 1.24 g antacid tablet.
The antacid tablet was added to 50.00 cm3 of 0.100 mol dm−3 sulfuric acid, which was in excess.
(a)
Calculate the amount, in mol, of H2SO4.
[1]
Markscheme
n(H2SO4) «= 0.0500 dm3 × 0.100 mol dm–3» = 0.00500/5.00 × 10–3«mol»
[1 mark]
