This is a little confusing to me; i.e., #1 will make a buffer but not a very good one. #4 will have a pH = 7.0 but not good buffering characteristics.
I need to know what you don't understand and what have you answered (and why?)
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
1 answer
1 answer