Weak Acid Strength

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Jason Wu 1E
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Joined: Thu Jul 25, 2019 12:15 am

Weak Acid Strength

Postby Jason Wu 1E » Thu Nov 28, 2019 10:32 pm

What is the best way to determine which acid is stronger if you are given two different types of weak acids? Is there a foolproof step you can use to determine it?

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Re: Weak Acid Strength

Postby VPatankar_2L » Thu Nov 28, 2019 11:34 pm

The greater the electronegativity of A in A-H for binary acids, across a period, the stronger the acid. The stronger the bond between A and H in A-H down a group, the weaker the acid. For oxoacids, the greater the number of oxygen atoms bound to the central atom, the stronger the acid. Oxoacids can readily lose H+ if resulting anion is stabilized by electron withdrawing atoms which delocalize and stabilize the negative charge.

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Re: Weak Acid Strength

Postby LReedy_3I » Fri Nov 29, 2019 2:11 pm

Following periodic trends is a good way to determine this. Atoms with smaller radii will form weaker acids because the bonds are stronger.
Last edited by LReedy_3I on Fri Nov 29, 2019 2:23 pm, edited 1 time in total.

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Re: Weak Acid Strength

Postby ZainAlrawi_1J » Fri Nov 29, 2019 2:14 pm

The more electronegative an atom, the weaker the acids it will form.

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