Among the group 1 elements, which of the following hydrogen carbonates (bicarbonates) does NOT exist — s Block Elements Chemistry Question
Question
Among the group 1 elements, which of the following hydrogen carbonates (bicarbonates) does NOT exist as a stable solid at room temperature?
Answer: C
💡 Solution & Explanation
Bicarbonates of alkali metals generally exist as solid crystals, except for Lithium. Due to the exceptionally small size and high polarizing power of the $Li^+$ ion, it cannot stabilize the large $HCO_3^-$ ion in a solid crystal lattice. Thus, $LiHCO_3$ exists only in aqueous solution.
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