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Which of the four solutions is the best buffer against addition of acid or base? a.na2hpo4 b.na2hpo4 + nah2po4 c.nah2po4 d.h2o submit for grading save and finish later?
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1 vote
Which of the four solutions is the best buffer against addition of acid or base?

a.na2hpo4
b.na2hpo4 + nah2po4
c.nah2po4
d.h2o submit for grading save and finish later?

User Sepupic
by
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1 Answer

7 votes

b. Na2HPO4 + NaH2PO4.

A buffer is a solution of a weak acid and its conjugate base. The weak acid is H2PO4^(-) and its conjugate base is HPO4^(2-).

All the other options are incorrect because they consist of only a single component.

User Smorka
by
6.6k points
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