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Please include the detailed explanation of the answer, because i have an hard time for understanding chemistry.

4. Which of the following is a weak acid? a. HCN b. HCI с.HCIO4 d. H2SO4

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Answer #1

All strong acids available are

HCl, HBr, HI, HNO3, HClO3, HClO4, H2SO4

These are only strong acids.

So, b, c, d are strong acids.

HCN is weak acid

Answer: a

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