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August 2, 2015

Homework Help: science(chem) Dr.Bob Question from before

Posted by ~christina~ on Saturday, September 20, 2008 at 10:29pm.

I'm doing an experiment and I'm supposed to have neutral basic and acid samples of solution.

I just wanted to make sure that I knew which was which. (If I'm incorrect, please correct me)

Acid: 0.7ml 10% H2SO4 + 0.7ml 10% Na2WO4(sodium tungstate)

Basic: 0.7ml NaOH + saturated HgCl2

Neutral: 0.7ml saturated K2CO3

Thank you.


Responses


science(chem) - DrBob222, Saturday, September 20, 2008 at 10:42am
I would expect the first one to be acid, the second to be basic and the third to be basic. K2CO3 is the salt of a strong base (KOH) and a weak acid (H2CO3) so it will hydrolyze to produce OH^- and that should make it basic. NaCl or KCl solutions will be neutral.

The last one was what was confusing me. The manual I'm using says that one should be acidic, basic, and neutral.

I don't know how this would work.
I was told in the manual that I would have one of each.

I do add ethanol to each as well (later) Would this affect the basisity/acidity thus making the last, neutral?

Thank you,
Dr.Bob

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