6D.15 part b

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Ellis Song 4I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

6D.15 part b

Postby Ellis Song 4I » Thu Jan 23, 2020 12:44 am

Calculate the pH of b) 0.055 M AlCl3. The K value isn't given and is not in the tables in the textbook. How are we supposed to solve this?

Kevin Xu 4F
Posts: 50
Joined: Fri Aug 09, 2019 12:16 am

Re: 6D.15 part b

Postby Kevin Xu 4F » Thu Jan 23, 2020 1:00 am

The Ka of metal cations is given in in a chart in 6.D.1 and the value of Ka for Al3+ when forming the Al((H20)6)3+ compound is 1.4 * 10^-5. You can then use that Ka in a normal ICE box equation, with dissociation into H+ ion and then use it to solve the pH value.

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