Identifying Acids and Bases

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Andrew Liang 1I
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Identifying Acids and Bases

Postby Andrew Liang 1I » Wed Nov 27, 2019 12:07 am

Is there are way to identify a strong/weak acid or base by just looking at the compound?

Mashkinadze_1D
Posts: 87
Joined: Sat Aug 24, 2019 12:15 am

Re: Identifying Acids and Bases

Postby Mashkinadze_1D » Wed Nov 27, 2019 12:24 am

Strong bases will contain column 1/2 elements. The strong acids are hydrochloric, hydrobromic, perchloric, nitric, sulfuric, and hyrodioic. For acids, you should just memorize them as there is only six and it will make it easier.

Zaynab Hashm 2I
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Joined: Wed Sep 11, 2019 12:15 am
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Re: Identifying Acids and Bases

Postby Zaynab Hashm 2I » Wed Nov 27, 2019 12:30 am

in addition to the answer above, I have noticed two more things:

weak acids usually have carbon or phosphorus in them (ex. carboxyl group COOH)
weak bases usually have nitrogen in them (ex. amine group NH2 or NH3)

but again, this ISN'T a guideline you should always depend on!

Jialun Chen 4F
Posts: 108
Joined: Sat Sep 07, 2019 12:16 am

Re: Identifying Acids and Bases

Postby Jialun Chen 4F » Wed Nov 27, 2019 4:00 am

I agree with Mashkinadze's answer. I personally just memorize the specific strong acids/bases.

Angela Patel 2J
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Joined: Sat Aug 24, 2019 12:17 am

Re: Identifying Acids and Bases

Postby Angela Patel 2J » Wed Nov 27, 2019 9:17 am

Why do strong acids have elements in group 1/2?

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: Identifying Acids and Bases

Postby Justin Quan 4I » Wed Nov 27, 2019 11:43 am

Andrew Liang 4G wrote:Is there are way to identify a strong/weak acid or base by just looking at the compound?

Personally, I think it is easier to memorize the strong acids and strong bases, then assume all other acids and bases are weak.

alexfwang3g
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

Re: Identifying Acids and Bases

Postby alexfwang3g » Wed Nov 27, 2019 12:16 pm

Strong bases contain group 1/2 elements. Strong acids should just be memorized. There's only 6 - HCl, H2SO4, HI, HNO3, HBr, HClO4.

Sara Richmond 2K
Posts: 110
Joined: Fri Aug 30, 2019 12:16 am

Re: Identifying Acids and Bases

Postby Sara Richmond 2K » Thu Nov 28, 2019 11:52 am

Typically strong acids have a greater difference in electronegativity than weak acids. While weak bases have a smaller difference in electronegativity than strong bases.

Brynne Burrows 3K
Posts: 52
Joined: Thu Jul 25, 2019 12:16 am

Re: Identifying Acids and Bases

Postby Brynne Burrows 3K » Thu Nov 28, 2019 12:01 pm

Strong acids are HCl, H2SO4, HI, HNO3, HBr, and HClO4, weak acids typically have carbon or phosphorus. Some of the strong bases are NaOH, Ba(OH)2, CsOH, and KOH, while weak bases typically have ammines. Nitrogen makes it a weak base because its lone pair can sometimes break the O-H bond in H2O.


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