Homework Help: Chemistry

Posted by Anonymous on Tuesday, November 1, 2011 at 9:00am.

How would I get the Ice of the titration of 40.00ml of 0.100M H2NNH2(aq) having a Kb of 3.0x10^-6 by 0.100M HClO4(aq)?

Trying to plot a pH curve. I know the combination of acid base is strong acid weak base

Chemistry - DrBob222, Tuesday, November 1, 2011 at 2:27pm
millimoles H2NNH2 = mL x M = 40.00 x 0.100M = 4.000 mmoles.
mmoles HClO4 = mL x 0.1M = ??. You don't list any of the volumes.
Here is how the ICE chart would look.

....H2NNH2 + HClO4 ==> H2NNH3^+ + ClO4^-
begin..4.000...0........0...........0
add...........?mmols.................
change.-?mmoles.-?mmoles.+mmoles.
equil..4-?.......0......+mmoles

Then use the Kb expression for zero mL HClO4. Use the Henderson-Hasselbalch equation for all HClO4 volumes after the beginning and before the equivalence point. Use the hydrolysis of the salt at the equivalence point and use excess HClO4 for all volumes after the equivalence point. The curve should look like one of these (or the reverse of one of these).
http://www.chemguide.co.uk/physical/acidbaseeqia/phcurves.html

Answer this Question

Related Questions

chemistry 12 - how would i sketch a pH curve for the titration of40.00mL of 0....
Chemistry - I really don't get pH curves. I have to sketch a pH curve for ...
Chemistry 12 - I really don't get pH curves. I have to sketch a pH curve for...
Shelly - I really don't get pH curves. I have to sketch a pH curve for the ...
chemistry 12 - sketch a ph curve for the titration 40.00 mLof 0.100M hyrazine ...
chemistry 12 - hey i was wondering, i have this question: Sketch a pH curve for ...
chemistry 12 - A) Calculate [OH^-] in a o.12 M solution of hydrazine, H2NNH2(aq...
Chemistry 12 - Hey guys i only have this question left on my review and i just ...
chem12 - Hey guys i only have this question left on my review and i just can'...
chemistry - In Chemistry: what is ph during the titration of 20.00ml of 0.1000m ...

For Further Reading

First Name:
School Subject:
Answer: