Homework Help: CHEMISTRY

Posted by Jematormal91 on Tuesday, March 27, 2012 at 10:26pm.

a) Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).

b) Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

CHEMISTRY - DrBob222, Tuesday, March 27, 2012 at 10:55pm
I've worked this, or at least a variation of it, earlier today. If you can't find it let me know and I'll try to find it and give you a link.
CHEMISTRY - Jematormal91, Tuesday, March 27, 2012 at 11:26pm
I tried doing it and got for a) -0.03 and b) 0.03 but the program keeps telling me I have the wrong answers... I don't know what I am doing wrong.
CHEMISTRY - DrBob222, Wednesday, March 28, 2012 at 12:03am
If you had posted your work I could have found your error by now. You didn't and I have no idea what you've done. Here is a link to the other one.
http://www.jiskha.com/display.cgi?id=1332885681
CHEMISTRY - Anonymous, Sunday, January 13, 2013 at 4:08pm
(a) 60 mL of 0.100 M HCl and 10.0 mL of 0.480 M HCl

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