0.04 M solution of ( ) is diluted to reduce its molar concentration to half

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

0.04 M solution of

\text{CH}_3\text{NH}_2

(

\text{p}K_b = 3.3010

) is diluted to reduce its molar concentration to half. The change in

\text{pH}

during dilution is : (1) +0.1615 (2) -0.1615 (3) +0.2615 (4) -0.2615