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### Topic: Hydroxide Ion Concentration Calculation  (Read 4659 times)

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#### akxt

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##### Hydroxide Ion Concentration Calculation
« on: July 06, 2009, 09:29:09 PM »
Please check my work and tell me what i am doing wrong,

What is the hydroxide ion concentration in a solution formed by combining 200mL of .15M HCl and 300mL of .091M NaOH @25*C?

(.15)(.2) = .03mol HCl
.03mol / .5L = .06M

(1.0*10^-14) = .06M [OH-]

[OH]- = 1.67 x 10^-13 M

Did I do this right? The answer key says the answer should be 1.9 x 10^-12M.
Thanks!!

#### Astrokel

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##### Re: Hydroxide Ion Concentration Calculation
« Reply #1 on: July 06, 2009, 10:11:42 PM »
What is the moles of HCl?
What is the mole of NaOH?
After neutralization, how many moles of NaOH left?
No matters what results are waiting for us, it's nothing but the DESTINY!!!!!!!!!!!!