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Chemical Reactivity

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Question

Give reasons for the $H_{2} O$ is less acidic than $H_{2} S$ .

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Solution

The $S - H$ bond is weaker than the $O - H$ bond due to which $H_{2} S$ more easily donates a proton and is, therefore, more acidic.
The $H_{2} O$ bond is stronger than the $H_{2} S$ due to the presence of intermolecular hydrogen bonding.

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