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#1
March 17th, 2006, 21:03
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Buffer Solutions
Out of these buffers:
CH3CO2H H20 NaCH3CO2 NaH2PO4 Na2HPO4 CH3CO2H/NaCH3CO2 Na2HPO4/Na2HPO4 Which buffer works the best and least?Why? Is NaCH3CO2 a weak base or acid? What is the chemical equation when adding NaOH or HCl to (Na2HPO4/Na2HPO4)? Thanyou for helping me 
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#2
March 27th, 2006, 20:31
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Weak acids make strong buffers.
Weak bases make strong buffers. Sort by pka from small to large for ascending buffer strength...as a general rule. Strong acids or bases want to give up H or OH so they dont control pH very well. Buffer Solutions weaker(more dilute) than E-02Molar get tricky, then water contributes significantly toward strength. Terry |
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