alleryStart learning →Which hydrated metal ions do not give acidic solutions in water?
AThose of the transition metal elements
BThose of the alkali metal elements only
CThose carrying a charge above plus two
DThose with an unusually small ionic size
Answer & Solution
Correct answer: B. Those of the alkali metal elements only
1. Ionisation constants are unknown for many metal ions, so their extent cannot be calculated.
2. What is known is that practically all hydrated metal ions give acidic solutions.
3. The one group set aside is the alkali metals.
4. Those ions carry only a single positive charge and are comparatively large.
5. A high charge or a small size makes an ion more acidic, not less.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.4 Hydrolysis of Salt Solutions_
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