Strength and Weakness

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sharonvivianv
Posts: 63
Joined: Fri Apr 06, 2018 11:05 am

Strength and Weakness

Postby sharonvivianv » Sun Jan 20, 2019 4:35 pm

How do I compare the strength of two acids?

Cienna Henry 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am
Been upvoted: 1 time

Re: Strength and Weakness

Postby Cienna Henry 1J » Sun Jan 20, 2019 5:09 pm

Compare their K values. The larger the value of Ka, the stronger the acid.

davidbakalov_lec2_2L
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Strength and Weakness

Postby davidbakalov_lec2_2L » Sun Jan 20, 2019 5:11 pm

The main way to compare is to look at their corresponding Ka values. Higher values mean that the forward reaction is more favored, which thereby means that the acid dissociates to a greater extent and is therefore stronger.

Aili Ye 4L
Posts: 58
Joined: Fri Sep 28, 2018 12:16 am

Re: Strength and Weakness

Postby Aili Ye 4L » Fri Jan 25, 2019 3:14 pm

Look at the Ka, the larger the Ka the more favored the dissociation into H3O+ and the stronger the acid. Or look at pKa- the smaller the pKa the stronger the acid.

Ray Guo 4C
Posts: 90
Joined: Fri Sep 28, 2018 12:15 am

Re: Strength and Weakness

Postby Ray Guo 4C » Fri Jan 25, 2019 3:37 pm

If possible, you can compare their X-H bond strength to see which one is more likely to lose protons. That would be the stronger acid.


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