Wednesday

October 22, 2014

October 22, 2014

Posted by **Annie** on Saturday, June 7, 2014 at 8:18pm.

when i did it i did -log(1.0) but that is just 0 so what it the procedure to do this question

Calculate the pH of a 1.0 mol/L aqueous solution of sodium benzoate. Note: Only the benzoate ion affects the pH of the solution.

- Chemistry -
**DrBob222**, Saturday, June 7, 2014 at 11:22pmBenzoate ion hydrolyzes in water to form a solution that is not neutral.

If we call the benzoate ion Bz^-, then

.........Bz^- + HOH ==> HBz + OH^-

I........1.0..............0.....0

C........-x..............x.....x

E.......1-x..............x......x

Kb for Bz^- = (Kw/Ka for HBz) = x*x/(1-x) and solve for x = (OH^-),then convert to pH.

HBz is benzoic acid. You can find Ka for HBz in you text/notes I'm sure but it's approx 10^-5.

- Chemistry -
**Annie**, Saturday, June 7, 2014 at 11:38pmthanks

**Answer this Question**

**Related Questions**

chemistry - Please let me know if my answer to the following question is correct...

Math - I just have a quick question regarding this question: Simplify. State any...

math - write as a single logarithm: -2logbase3(1/x)+(1/3)logbase3(square root of...

General Chemistry-Acids/Bases - I'm stuck on a couple of similar problems ...

Trigonometry - This is a logs question If u=x/y^2, which expression is ...

Chemistry - Calculate the pH of a 100mL solution of 0.10M acetic acid ka=1.8x10...

Math - solve log(7x-3)+2log(5)=2+log(x+3) I've attempted to do this question ...

Chemistry - The question is: what is the ratio [NH3/[NH4+] in an ammonia/...

check! - here is the question: log5(x-4)= log7x solve for x. These are just base...

LOGARITHMS - HI THE QUESTION STATES THAT ONE SHOULD CALCULATE THE LOGS WITHOUT ...