Stronger Acid than another

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305086803
Posts: 99
Joined: Wed Sep 18, 2019 12:16 am

Stronger Acid than another

Postby 305086803 » Mon Dec 02, 2019 7:54 pm

Why is CCCL3COOH, pKa 0.52 a stronger acid than CH3COOH, pKa 4.75

Haley Dveirin 1E
Posts: 101
Joined: Sat Jul 20, 2019 12:17 am

Re: Stronger Acid than another

Postby Haley Dveirin 1E » Mon Dec 02, 2019 8:01 pm

The acid with the lower PkA is always stronger.

haileyramsey-1c
Posts: 105
Joined: Thu Jul 25, 2019 12:18 am

Re: Stronger Acid than another

Postby haileyramsey-1c » Mon Dec 02, 2019 9:17 pm

A high Ka and a low pKa indicate a strong acid. Since, pKa is the negative log of Ka it means the acid is more fully dissociated in water.

Natalie Nartz 4F
Posts: 50
Joined: Thu Jul 11, 2019 12:17 am

Re: Stronger Acid than another

Postby Natalie Nartz 4F » Mon Dec 02, 2019 9:20 pm

A lower pKa indicates a stronger acid. A low pKa means the Ka value is higher, meaning the acid dissociates faster, therefore making it stronger

Nyari Muchaka_Discussion 4A
Posts: 53
Joined: Thu Sep 19, 2019 12:17 am

Re: Stronger Acid than another

Postby Nyari Muchaka_Discussion 4A » Mon Dec 02, 2019 9:27 pm

The molecules are identical except one has three chlorine and the other three hydrogens. Since chlorine is more electronegative ti will pull more strongly on the electrons and thus create a more stable molecule through electron delocalization. As chlorine pull on the electrons, the hydrogen becomes more positively charged and is thus easier to pull off using a negatively charged molecule hence making the first option the stronger acid.

305086803
Posts: 99
Joined: Wed Sep 18, 2019 12:16 am

Re: Stronger Acid than another

Postby 305086803 » Fri Dec 06, 2019 3:13 am

Thanks so much everyone, I understand it now!


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