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# acid/base question?

1. How do you calculate the theoretical pH of a strong acid w/o a pH meter?

2. How do you calculate the theoretical pH of a weak acid w/o a pH meter?

### 1 Answer

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- ChemTeamLv 71 month agoFavourite answer
1. Use the following equation:

pH = -log [H^+]

2. Use the following equation (for a generic acid):

Ka = ([H^+] [A^-]) / [HA]

then use the equation in 1.

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