Posted by kc on Thursday, April 12, 2012 at 8:48pm.
Buffers are solutions contg a weak acid and its salt or a weak base and its salt OR something that can form a weak acid/base and salt.
b. Has weak acid,HF, and salt KF.
c. Has weak base, NH3, and salt, NH4Cl.
e. Has NaNO2 which is the salt of a weak acid and it contains HNO3 which can form a weak acid, HNO2, from the NaNO2 salt.
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