First slide

Basic Buffer

Question

A basic buffer solution contains a weak base B and its conjugate acid BH⁺. On adding some HCl, which of the following reactions takes place to maintain constant pH ?

Easy

A

$\large B{H^ + }\, \to \,B\, + \,{H^ + }$
B

$B\, + \,{H_2}O\, \to \,B{H^ + }\, + \,O{H^ - }$
C

${H^ + }\, + \,B\, \to \,B{H^ + }$
D

$B{H^ + }\, + \,O{H^ - }\, \to \,B\, + \,{H_2}O$

Solution

Incoming chemical species is an acid and so a base is required to neutralise it to maintain constant P^H
${H^ + }\, + \,B\, \to \,B{H^ + }$

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