DP Chemistry (last assessment 2024)
Question 17N.2.sl.TZ0.5b.iii
| Date | November 2017 | Marks available | [Maximum mark: 1] | Reference code | 17N.2.sl.TZ0.5b.iii |
| Level | sl | Paper | 2 | Time zone | TZ0 |
| Command term | State | Question number | b.iii | Adapted from | N/A |
b.iii.
[Maximum mark: 1]
17N.2.sl.TZ0.5b.iii
The equations for two acid-base reactions are given below.
HCO3– (aq) + H2O (l) H2CO3 (aq) + OH– (aq)
HCO3– (aq) + H2O (l) CO32– (aq) + H3O+ (aq)
(b.iii)
State the conjugate base of the hydroxide ion, OH–.
[1]
Markscheme
oxide ion/O2–
