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Which of the following sets of chemicals can be used to prepare buffer solutions? For each...

Which of the following sets of chemicals can be used to prepare buffer solutions? For each one that can, identify the weak acid and its conjugate base. Include charge (if any) and phase. Enter "none" for both if a buffer is not possible. A.) Na2HPO4+HCl Is a buffer possible (Yes or No) and what is the weak acid and what is the conjugate base B.)NH4Cl+NH3 Is a buffer possible (Yes or No) and what is the weak acid and conjugate base

C.)Na3PO4+NaOH Is a buffer possible (Yes or No) What is the weak acid and Conjugate base

D.)NH4Cl+NaNO3 Is a buffer possible (yes or no) What is the Weak Acid and Conjugate Base?

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Answer #1

ANS.

(A). Na2HPO4+HCl

Buffer not possible because both the reagents are acidic in nature.

Na2HPO4 is the weak acid.

Conjugate base will be PO43-

(B). NH4Cl+NH3

Yes

NH4+ weak acid

NH3 conjugate base

(C). Na3PO4+NaOH

No buffer possible

None

(D) NH4Cl+NaNO3

No buffer possible

NH4+ weak acid

NH3 CONJUGATE BASE

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