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Which of the following metal carbonates has the highest molar solubility? A - HSC - SSCE Chemistry - Question 3 - 2019 - Paper 1
Question 3
Which of the following metal carbonates has the highest molar solubility? A. Calcium carbonate B. Copper(II) carbonate C. Iron(II) carbonate D. Lead(II) carbonate
Worked Solution & Example Answer:Which of the following metal carbonates has the highest molar solubility? A - HSC - SSCE Chemistry - Question 3 - 2019 - Paper 1
Step 1
Identify the Metal Carbonates and their Characteristics
Answer
We need to examine the solubility characteristics of each carbonate listed:
- Calcium Carbonate (CaCO₃): Known to have low solubility in water.
- Copper(II) Carbonate (CuCO₃): Slightly more soluble than calcium carbonate.
- Iron(II) Carbonate (FeCO₃): Also has low solubility, generally comparable to calcium carbonate.
- Lead(II) Carbonate (PbCO₃): Considered to have even lower solubility compared to calcium carbonate.
Step 2
Comparative Solubility Assessment
Answer
In a comparative assessment of their solubility:
- The general trend is that transition metal carbonates such as copper and iron have higher solubility compared to alkaline earth metal carbonates (like calcium).
- Among the given options, Copper(II) Carbonate ( CuCO₃) typically presents higher molar solubility when compared to others.
Step 3