Question

a) How many hydrogen bonded water molecules are associated in ${CuSO}_4\cdot 5H_{2}O$?
b) Define coal gassification with example.
c) Write chemical reaction of lab preparation of $H_2{O}_2$

Answer 1

Solution:-

(a) Only one molecule of water is hydrogen bonded. The other four molecules of water are coordinated.

${\left[Cu{\left(H_{2}O\right)}_4\right]}^{2+}{S{O}_4}^{-2}.H_{2}O$

(b) Coal gasification is a thermo-chemical process in which the gasifier's heat and pressure break down coal into its chemical constituents.

Ex- Production of syngas

(c) Chemical reaction for lab preparation of $H_2{O}_2$-

$\underset{\text{conc.}}{H_{2}S{O}_4}\stackrel{\text{electrolysis}}{\to }2H^{+}+2{HS{O}_4}^{-}\underset{-2e^{-}}{\overset{\text{anode}}{\to }}{H}_2{S}_2{O}_8\stackrel{+2H_{2}O}{\to }2H_{2}S{O}_4+H_2{O}_2$