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Buffer A has: 5mL club soda and 5 mL sodium bicarbonate Buffer B has: 1mL club...

Buffer A has: 5mL club soda and 5 mL sodium bicarbonate

Buffer B has: 1mL club soda and 9mL sodium bicarbonate

After adding NaOH to both buffer A and B, which is a better buffer ( A or B) and why

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Answer #1

Club soda is nothing but carbonated water. It will act as salt of weak base NaHCO3.
Upon addition of NaOH, both buffer A and B shows buffer action with their club soda component. Club soda will try to nullify the effect of added OH- by producing minimal water.
As, in buffer B, club soda part is very less, after strong base NaOH addition, it's buffer action is altered in such a way that it can't withstand further NaOH addition like before.
But, in buffer A, it can withstand the addition of NaOH further by its club soda part. In addition to this, the same volume of both club soda and sodium bicarbonate in Buffer A, makes it a good buffer system. (As less chemical used, concentration of chemical used is not so high)

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