Arrange the hydrides of Group 16 () in strictly increasing order of their acidic strength in aqueous — p Block Elements Chemistry Question
Question
Arrange the hydrides of Group 16 ($H_2O, H_2S, H_2Se, H_2Te$) in strictly increasing order of their acidic strength in aqueous solution.
Answer: A
💡 Solution & Explanation
As we move down Group 16, atomic size increases, causing the H-E bond length to increase. This considerably lowers the bond dissociation enthalpy, making it progressively easier to release a proton ($H^+$). Thus, acidic strength increases smoothly from $H_2O$ to $H_2Te$.
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