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anonymous
 3 years ago
what is the pH of 100 mM HCl?
anonymous
 3 years ago
what is the pH of 100 mM HCl?

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abb0t
 3 years ago
Best ResponseYou've already chosen the best response.0100mM = 10*10^4 OR 1*10^3 [H+] = 1*10^3 pH = log 1*10^3 pH = 6.90

cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.0?  how did you get 6.9???

abb0t
 3 years ago
Best ResponseYou've already chosen the best response.0Oh, you're right. It should be 3. My mistake. I should of known it was wrong. a pH of almost 7 for HCl makes no sense :P

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I don't get why it should be three  surely the pH is the log10 of the H+ concentration so it's log10(0.1) =1 so pH = 1. If it was 1M HCl the pH woould be 0, since log 10 of 1 is 0. pH=3 if the concentration of H+ is 1mM surely?
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