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Chemistry Homework Help => AP Chemistry => Topic started by: ann on March 15, 2023, 08:29:53 PM

Title: Acid/Base/pH Question
Post by: ann on March 15, 2023, 08:29:53 PM
This is the question:
Approximately how much water should be added to 10.0 mL of 12.0 M HCl so that it has the same pH as 0.90 M acetic acid (ka=1.80 * 10^-5)?

I am unsure of how to do this
Title: Re: Acid/Base/pH Question
Post by: ann on March 15, 2023, 08:52:18 PM
Here is my attempt at this problem. Am I right?
Title: Re: Acid/Base/pH Question
Post by: uma on March 15, 2023, 09:41:54 PM
Once you have calculated the pH of the acetic acid then it means you know concentration of H+ = 10^-pH
New concentration is 10^-pH for HCl .
Use dilution law to get volume needed to dilute.
M1V1= M2V2