## when to use what equation

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

### when to use what equation

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.

Annika Zhang 1F
Posts: 49
Joined: Sat Jul 20, 2019 12:15 am

### Re: when to use what equation

to find pH you generally use -log[H+] when given H+ concentration or 14-(-log[OH-]) the given the concentration of OH-.

Jesse Anderson-Ramirez 3I
Posts: 54
Joined: Thu Sep 26, 2019 12:18 am

### Re: when to use what equation

Also, 10^-ph gives you the H+ concentration.

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

### Re: when to use what equation

when do I use the Ka and Kb equations?

Ian Morris 3C
Posts: 101
Joined: Wed Sep 18, 2019 12:18 am

### Re: when to use what equation

Ka and Kb is for weak acids and bases.

ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

### Re: when to use what equation

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

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