Textbook Problem 6E1

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nicole_ershaghi 3F
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Textbook Problem 6E1

Postby nicole_ershaghi 3F » Wed Jan 31, 2024 9:50 pm

The textbook problem 6E1 asks to find the pH of 0.15M H2SO4. In looking at the solution, I noticed that the 0.15 carried over to the products of the Ka2 equation and I was wondering why the 0.15 carries over.

Aisha Randhawa 2G
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Re: Textbook Problem 6E1

Postby Aisha Randhawa 2G » Wed Jan 31, 2024 9:55 pm

This is because H2SO4 is a strong acid, so it is an exception to most diprotic acids. Because H2SO4 is a strong acid, it dissociates completely, meaning that you end up with 0.15 M of H3O+ and HSO4-. This is why when you form an ICE table for the Ka2 equation, you already start off with 0.15 M HSO4- and 0.15 H3O+.


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