when to use what equation

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205192823
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

when to use what equation

Postby 205192823 » Sat Dec 07, 2019 5:35 pm

I was going over the textbook and I was still confused on when I should use what equation when solving for the pH for certain things.
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Annika Zhang 1F
Posts: 49
Joined: Sat Jul 20, 2019 12:15 am

Re: when to use what equation

Postby Annika Zhang 1F » Sat Dec 07, 2019 6:53 pm

to find pH you generally use -log[H+] when given H+ concentration or 14-(-log[OH-]) the given the concentration of OH-.
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Jesse Anderson-Ramirez 3I
Posts: 54
Joined: Thu Sep 26, 2019 12:18 am

Re: when to use what equation

Postby Jesse Anderson-Ramirez 3I » Sat Dec 07, 2019 7:04 pm

Also, 10^-ph gives you the H+ concentration.
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205192823
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: when to use what equation

Postby 205192823 » Sat Dec 07, 2019 9:58 pm

when do I use the Ka and Kb equations?
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Ian Morris 3C
Posts: 101
Joined: Wed Sep 18, 2019 12:18 am

Re: when to use what equation

Postby Ian Morris 3C » Sat Dec 07, 2019 10:15 pm

Ka and Kb is for weak acids and bases.
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ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

Re: when to use what equation

Postby ramiro_romero » Sat Dec 07, 2019 11:46 pm

[H+]= 10^-pH [OH-}= 10^-pOH pH=-log[H+] pH= 14-(-log[OH-])
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