Question:
The solubilities of carbonates decrease down the magnesium group due to a decrease in :
The solubilities of carbonates decrease down the magnesium group due to a decrease in :
Updated On: Jul 2, 2022
- lattice energies of solids
- hydration energies of cations
- inter-ionic attraction
- entropy of solution formation
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The Correct Option is B
Solution and Explanation
Solubilities of carbonates decreases down the group because lattice energy decrease is almost constant while decrease in hydration energy happens sharply. Finally difference of hydration energy and lattice energy decreases thus solubility decreases.
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Concepts Used:
Group 1 Elements
Group one of alkali metals is s-block elements with just one electron in their s-orbital. They are are alkali metals. They are named so because of the alkaline nature of the hydroxides and oxides.
Alkali metals are characterized by one s-electron in the valence shell of their atoms.
Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are:
- Lithium(Li)
- Sodium(Na)
- Potassium (K)
- Rubidium (Ru)
- Cesium (Cs)
- Francium (Fr)
They have occupied successive periods from first to seven. Francium is a radioactive element with very low half-life.
Electronic Configuration:
- Alkali metals have one electron in their valence shell.
- The electronic configuration is given by ns1. For example, the electronic configuration of lithium is given by 1ns1 2ns1.
- They tend to lose the outer shell electron to form cations with charge +1 (monovalent ions).
This makes them the most electropositive elements and due to the same reason, they are not found in the pure state.