(a) Solid NaOH (b) Solid CaCl2
(c) Solid Na2CO3.10H2O (d) Conc. sulphuric acid
(e) Iron (III) chloride
Answers:
(a) Solid NaOH – Increases in mass when exposed to air.
(b) Solid CaCl2– Increase in mass when exposed to air.
(c) Solid Na2CO3.10H2O – Decrease in mass when exposed to air.
(d) Conc. sulphuric acid – Increase in mass when exposed to air.
(e) Iron (III) chloride – Increase in mass when exposed to air.