Which of the following elements’ carbonate is least soluble in water?
Question and options
Which of the following elements’ carbonate is least soluble in water?
- Lithium
- Sodium
- Potassium
- Rubidium
Answer and explanation
Correct answer: A - Lithium
Among alkali-metal carbonates, solubility rises down the group. Lithium carbonate is only sparingly soluble, while sodium, potassium and rubidium carbonates are freely soluble, so lithium is the answer.
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