What is the pH of a solution made?

Chemistry
Tutor: None Selected Time limit: 1 Day

Apr 20th, 2015

pH=pka + log([CH3COO-]/[CH3COOH])

[CH3COOH]=n/v = 0,25 mole/ 250*10^-3 L = 1 mole/L 

[CH3COO-]= n/v = 0,8 mole / 250 *10^-3 L = 3,2 mole / L

so : log([CH3COO-]/[CH3COOH])= log(3,2/1) = 0,5051499783

So :  pH= 5,2651 

Good Luck 

Apr 20th, 2015

what did u plug into the calculater to find pH. Was it the inverse log 0.505?

Apr 20th, 2015

log( 3,2 ) = 0,505  and the inverse is  10^(0,505) = 3,2 

Good Luck 

Apr 20th, 2015

When you did the inverse did you add the negative? 10^(-0.505)? 

Apr 20th, 2015

i keep getting 0.3125

Apr 20th, 2015

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Apr 20th, 2015
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