Which buffer solution comprising of the following has its pH value greater than 7?

Question

Which buffer solution comprising of the following has its pH value greater than 7? (A)  CH3COOH+CH3COONa  (B)  HCOOH+HCOOK  (C)  CH3COONH4  (D)  NH4OH+NH4Cl

Tardigrade Admin · Accepted Answer

The pH value of basic buffer solutions is always greater than 7. Among the given, only NH4OH+NH4Cl constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7.

Q. Which buffer solution comprising of the following has its pH value greater than 7?

$C H_{3} COO H + C H_{3} COON a$

$H COO H + H COO K$

$C H_{3} COON H_{4}$

$N H_{4} O H + N H_{4} Cl$

The pH value of basic buffer solutions is always greater than 7. Among the given, only $N H_{4} O H + N H_{4} Cl$ constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7.

Q. Which buffer solution comprising of the following has its pH value greater than 7?

CH3​COOH+CH3​COONa

HCOOH+HCOOK

CH3​COONH4​

NH4​OH+NH4​Cl

The pH value of basic buffer solutions is always greater than 7. Among the given, only NH4​OH+NH4​Cl constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7.

$C H_{3} COO H + C H_{3} COON a$

$H COO H + H COO K$

$C H_{3} COON H_{4}$

$N H_{4} O H + N H_{4} Cl$

The pH value of basic buffer solutions is always greater than 7. Among the given, only $N H_{4} O H + N H_{4} Cl$ constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7.