What to do if an acid and a basic salt are together

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SandraChane_1B
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What to do if an acid and a basic salt are together

Postby SandraChane_1B » Mon Jan 29, 2024 5:23 pm

If there is a solution that contains both an acid (such as acetic acid) and a basic salt, then how would you set up the ICE table and how would you solve for pH?

Sarah Giovennella 1G
Posts: 43
Joined: Fri Sep 29, 2023 10:23 am

Re: What to do if an acid and a basic salt are together

Postby Sarah Giovennella 1G » Mon Jan 29, 2024 5:36 pm

Acetic acid's conjugate base has a charge of -1, and it normally forms a salt with other group one metals, such at Na+. Na+ is the weak conjugate acid of NaOH, meaning its presence in a solution does not affect the basicity/acidity. However, acetic acid has a strong conjugate base, causing the solution to be neutral and the equation to be COOH-+H2O<-->HCOOH+OH-. You would use the Kb of COOH- (perhaps by solving for it from the Ka of HCOOH) and come out with the expression Kb=x^2/([COOH-]initial-x) and solve for x to get [OH-], solve for pOH then solve for pH


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