Arrange `CaCO_(3),KHCO_(3)` and `NaHCO_(3)` in increasing order of solubilities.

Explanation

To arrange the compounds \( \text{CaCO}_3 \), \( \text{KHCO}_3 \), and \( \text{NaHCO}_3 \) in increasing order of solubility, we need to analyze their lattice energies, as solubility is inversely related to lattice energy. Here’s a step-by-step solution:

### Step 1: Understand Lattice Energy
Lattice energy is the energy required to separate one mole of an ionic solid into its gaseous ions. The higher the lattice energy, the less soluble the compound tends to be. Lattice energy can be estimated using the formula:

\[ \text{Lattice Energy} \propto \frac{Q_1 \times Q_2}{R_C + R_A} \]
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