Home / Aptitude Tests / Chemistry / Three drops of a 1.0...

Three drops of a 1.0 mol dm-3 solution of NaOH are added ...

Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will?

A.

Close to that of pure water

B.

Unaltered

C.

Greater than 8.4

D.

Less than 8.4

Correct answer is C

A strong base is one that fully dissociates to give ions in solution. Weak bases only partially dissociate in a solution,

while the strong bases dissociate fully in a solution. Weak bases have pH 7.3 – 10, strong ones have pH 10 – 14.