Monday

April 21, 2014

April 21, 2014

Posted by **Studying** on Sunday, November 25, 2012 at 10:25pm.

1. The hydronium ion concentration for a solution is determined to be

4.5 x 10^-7 M. What is the concentration of the hydroxide ion?

2. When a 5.00 mL sample of vinegar is titrated, 44.5 mL of 0.100 M NaOH solution is required to reach the end point. What is the concentration of vinegar in moles per liter of solution?

I'm not really sure what numbers to put where so if you could please walk me through how to do this so I can use it as a how-to for other problems like it on the study guide I would greatly appreciate it.

- Chemistry -
**DrBob222**, Sunday, November 25, 2012 at 10:44pm1.

(H^+)(OH^-) = Kw = 1E-14

Substitute for H^+ and solve for OH^-

2.

vinegar is acetic acid, HAc.

HAc + NaOH ==> NaAc + H2O

mols NaOH = M x L = ?

mols HAc = mols NaOH (Look at the coefficients in the balanced equation.) That's mols in 5.00 mL of the solution.

Then M HAc = mols HAc/L soln.

(you know L soln = 0.005L)

- Chemistry -
**Studying**, Sunday, November 25, 2012 at 10:48pmThank you. That helps.

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