How many of the following combination act as buffer
$(1)$ HCl + NaOH
$(2)$ $C H_{3} C O O N a + C H_{3} C O O H$
$(3)$ $H_{2} S O_{4} + N a_{2} S O_{4}$
$(4)$ $H_{2} C O_{3} + N a O H$
$(5)$ $N a_{2} B_{4} O_{7} + H_{3} B O_{3}$
$(6)$ $N H_{4} O H + N H_{4} C l$

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TestHub · Accepted Answer

Buffer are (1) C H 3 C O O N a + C H 3 C O O H (2) H 2 C O 3 + N a O H (3) N a 2 B 4 O 7 + H 3 B O 3 (4) N H 4 O H + N H 4 C l

Chemistry - Ionic Equilibrium Question with Solution | TestHub

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