Question

which of the following substances in water will show acidic properties? state reason.

sugar,carbon dioxide,acetic acid,alcohol,sulphur dioxide,urea.

Answer 1

i) Sugar solution is a neutral solution. It is a covalent compound and does not dissociate into ions.

ii) Carbon dioxide forms carbonic acid in water, hence it is acidic in nature:
H₂O + CO₂ → H₂CO₃
(carbonic acid)

iii) Acetic acid in water is acidic in nature, since acetic acid is weakly acidic.
$C{H}_{3}COOH\left(aq\right)+H_{2}O\left(l\right)$ ⇋ $C{H}_{3}CO{O}^{-}\left(aq\right)+H_3{O}^{+}\left(aq\right)$

iv) Alcohol in water is a neutral solution.

v) Sulphur dioxide in water forms sulphurous acid, hence it is acidic in nature.
SO₂ + H₂O → H₂SO₃

vi) Urea solution is a neutral solution as it doesnot dissociate into ions.