basic chem- ph

[[Tycho?]]

Calculate the pH of the solution which results from the mixing of 100.0 mL of

0.050 NaOH solution with an equal volume of 0.10 M HCl solution.

 

Seems straight forward to me. Strong acid and a strong base, so they'll react completely. You end up with .05M HCl, which is the molarity of H+, so you can just use -log(.05) to get the pH. I get 1.3.

 

But this is apparently incorrect, the answer given is 1.6. Can someone tell me where I went wrong?

[insane_alien]

see your other thread on the same

[AL]

Did you take into account dilution? If you add an equal volume of HCl, you now have 200.0 mL of solution.

[insane_alien]

yeah i said that in his other thread. seen that one before this. he didn't take into account the dilution.

[[Tycho?]]

Ohhhhh right. That crazy dilution. Thanks guys, I knew it was something stupid like that.

[Borek]

Well, you were already told that the problem is in dilution, but here is almost identical pH calculation question with explanation.

 

Best,

Borek

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