Multiple choice

The most soluble in water is

  1. BeCO3

  2. MgCO3

  3. CaCO3

  4. SrSO4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Among alkaline earth carbonates, solubility increases down the group. BeCO3 has the highest solubility due to the very small size and high charge density of Be²+ ion, which gives it exceptional hydration energy that overcomes lattice energy. MgCO3, CaCO3, and SrCO3 are progressively less soluble. SrSO4 is a sulfate (not carbonate) and is actually insoluble.

Keep practicing — related questions