Thursday
July 24, 2014

Homework Help: chemistry

Posted by bekah on Friday, March 28, 2014 at 2:45pm.

Select only the True statements about buffer systems.
Select all that are True.
1. Starting with NH3(aq) and adding a small amount of HCl(aq) will make a buffered solution.
2. The blood buffer, among other things, is supported by carbonic acid and its conjugate base bicarbonate.
3. If a buffer is made from a weak acid and its conjugate base, it will have a pH<7.0.
4. Mixing amounts of NaOH and HCl will make a buffer with a pH=7.0.
5. A mixture of similar amounts of NaH2PO4 and Na2HPO4 in an aqueous solution would have a pH around 7.2.
6. Making a solution of H2SO4(aq) and HSO4−(aq) is an ideal buffer.
7. A mixture of similar amounts of HCO3- and CO32- in an aqueous solution would have a pH around 6.4.
I have tried 7 times

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