Buffers - weak acid

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Deepika Pugalenthi 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Buffers - weak acid

Postby Deepika Pugalenthi 1A » Fri Jan 18, 2019 12:23 pm

When making buffers, it's always a weak acid and a salt. To make buffers of varying pH, the only factor changing is the strength of the weak acid?

Kenan Kherallah 2C
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: Buffers - weak acid

Postby Kenan Kherallah 2C » Fri Jan 18, 2019 12:29 pm

the buffer can be made by a weak base. Buffer solutions will not change in pH if there is a small change in the concentration of H+ or OH-. Hence, this means that a buffer solution must have a base and an acid component to react with either an added base or an added acid.

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Buffers - weak acid

Postby michelle » Fri Jan 18, 2019 5:21 pm

Buffer solution usually consists of a pair of conjugate weak acid and base. The variation in pH results from the Kc of acid/base.

Casandra
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Buffers - weak acid

Postby Casandra » Fri Jan 18, 2019 7:18 pm

Buffers can consist of a weak acid and its conjugate base, as well as the salt. Or vice-versa, a weak base and its conjugate base with the salt.

204929947
Posts: 76
Joined: Fri Apr 06, 2018 11:03 am

Re: Buffers - weak acid

Postby 204929947 » Fri Jan 18, 2019 7:48 pm

can someone explain what a buffer is? I did not really understand this, thankyou.


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