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Jedrick Zablan 3L
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Joined: Sat Aug 17, 2019 12:17 am


Postby Jedrick Zablan 3L » Thu Dec 05, 2019 9:05 pm

Hello! How do I get the molar concentration for this question? Thanks!

The molar concentration of HCl in hydrochloric acid is reduced to 12% of its initial value by dilution. What is the differ- ence in the pH values of the two solutions?

Robert Tran 1B
Posts: 118
Joined: Thu Jul 11, 2019 12:15 am

Re: 6B1

Postby Robert Tran 1B » Thu Dec 05, 2019 10:22 pm

Since pH uses a log scale, the initial molar concentration does not matter. To answer this problem, you can use any arbitrary value for the initial molarity and get the same answer.

Posts: 103
Joined: Fri Aug 02, 2019 12:15 am

Re: 6B1

Postby kevinolvera1j » Fri Dec 06, 2019 12:55 am

Find the pH of the first value, then subtract it from the second pH value. To find the second pH value simply multiply the first concentration by (V1/V2) inside the -log.

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