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Dr. Bob is Robert Hsiung, MD,
bob@dr-bob.orgShown: posts 1 to 3 of 3. This is the beginning of the thread.
Posted by ace on November 3, 2003, at 1:01:59
Larry --your sites rule again! My chem exam is coming up real soon!
One more- do you know of any sites that cover acid-base pH mixture questions such as...
"What is the pH of the solution obtained by adding 60.0mL of 0.10 M NaOH to 50 mL of 0.10 M HCL?"
Further, do you know the standard equation of solving these type questions. ie...some algorithm to solve them(is that the correct word?!) ie solving buffer problems uses the Henderson-Hassleback equation.
Thanks Larry- you rule! PS- I printed out so much of the material on the sites you recommended!!
Ace- fellow chemist (although I have a fair way to go yet!)
Posted by Larry Hoover on November 3, 2003, at 7:20:49
In reply to Calling Larry Hoover! urgent- chem exam!!!, posted by ace on November 3, 2003, at 1:01:59
> Larry --your sites rule again! My chem exam is coming up real soon!
>
> One more- do you know of any sites that cover acid-base pH mixture questions such as...
>
> "What is the pH of the solution obtained by adding 60.0mL of 0.10 M NaOH to 50 mL of 0.10 M HCL?"Strong acid/strong base neutralization reactions are analogous to titrations. You have to look at the stoichiometry, determine which of [H3O+] or [OH-] is in excess, and solve for -log [H3O+]. Tip: Don't forget to consider the total volume of the product solution. Watch for sig figs.
http://pages.pomona.edu/~wes04747/handout/equil_io.htm
http://www.towson.edu/~ladon/eqab.html
http://www.chemguide.co.uk/physical/acideqiamenu.html
www.sfu.ca/chemistry/faculty/ Li/chem215/s_monoprotic.PDF
> Further, do you know the standard equation of solving these type questions. ie...some algorithm to solve them(is that the correct word?!)
There isn't a single equation to use, such that you just plug in the numbers. You have to be able to apply a variety of equations, as needed.
> ie solving buffer problems uses the Henderson-Hassleback equation.
In special cases, like that of a weak acid in solution with substantial quantities of its conjugate base, you may find nice simplifications like H-H, but you should be able to derive H-H from first principles, or your comprehension will never get past the point of being a technician.
> Thanks Larry- you rule! PS- I printed out so much of the material on the sites you recommended!!
I don't know what's useful to you. I just gave you a variety of resources. Everybody has their own unique learning curve.
> Ace- fellow chemist (although I have a fair way to go yet!)I would be more comfortable if you thought of yourself as an apprentice, just yet. ;-)
Good luck on your exam. Tip: Create a list of all the acid-base equations you've been exposed to, and study them until you can come up with examples of ways to apply them, from your own imagination. That way, you'll have a grasp of what they "mean".
Lar
Posted by ace on November 6, 2003, at 0:18:07
In reply to Re: Calling Larry Hoover! urgent- chem exam!!! » ace, posted by Larry Hoover on November 3, 2003, at 7:20:49
This is the end of the thread.
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