Calculating pH of salt solution with acidic cation

Acidity
Basicity
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cara_cavarretta_3F
Posts: 32
Joined: Fri Sep 28, 2018 12:23 am

Calculating pH of salt solution with acidic cation

Postby cara_cavarretta_3F » Sat Dec 08, 2018 2:40 pm

Hey friends,
I read that we won't need to know the Ka and Kb constants until 14B, and these are necessary for Examples 12.10-11 in the 6th edition, so will we not be responsible for knowing how to do these kinds of calculations on the final?
Thanks

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: Calculating pH of salt solution with acidic cation

Postby Alana Sur 3B » Sat Dec 08, 2018 5:34 pm

I don't think we don't need to remember the constants but you should know the formula for calculating Ka and Kb

Henry Dudley 1G
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: Calculating pH of salt solution with acidic cation

Postby Henry Dudley 1G » Sat Dec 08, 2018 6:38 pm

Alana Sur 3B wrote:I don't think we don't need to remember the constants but you should know the formula for calculating Ka and Kb


The formula for calculating Ka is just -log(PKa) and the formula for calculating Kb is just -log(PKb) right?

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: Calculating pH of salt solution with acidic cation

Postby Alana Sur 3B » Sat Dec 08, 2018 9:15 pm

Henry Dudley 1I wrote:
Alana Sur 3B wrote:I don't think we don't need to remember the constants but you should know the formula for calculating Ka and Kb


The formula for calculating Ka is just -log(PKa) and the formula for calculating Kb is just -log(PKb) right?


And that Ka = [Concentration of product1][ Concentration of product2]/ [Concentration of Reactant]

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: Calculating pH of salt solution with acidic cation

Postby Alana Sur 3B » Sat Dec 08, 2018 9:16 pm

We don't include the products and reactants in liquid state when calculating that^^

cara_cavarretta_3F
Posts: 32
Joined: Fri Sep 28, 2018 12:23 am

Re: Calculating pH of salt solution with acidic cation

Postby cara_cavarretta_3F » Sun Dec 09, 2018 11:47 pm

Thank you!!


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