One litre of buffer solution contains 0.1 mole of acetic acid add 1 mole of sodium acetate. Find its pH if pK_(a) of CH_(3)COOH is 4.8.

One litre of buffer solution contains 0.1 mole of acetic acid add 1 mo

1.	One litre of buffer solution contains 0.1 mole of acetic acid add 1 mole of sodium acetate. Find its pH if pK_(a) of CH_(3)COOH is 4.8.
Answer» SOLUTION :`pH= pK_a + LOG"" (["salt"])/(["acid"])` [ Salt ] =[Acid] =1 `thereforepH = 4.8= pK_a ` moleof NaOHadded to the solution = 4/40 = 0.1 After ADDING 0.1 mole of CAUSTIC SODA to the buffer solution `pH = 4.8 + log""(1.1)/( 0.9 ) = 4.8 + log 1.222 = 4.886`