Hydrogen peroxide was discovered by the French Chemist J.L. Thenard in 1818. Preparation 1)From sodium peroxide (Merck's method) Calculated amount of sodium peroxide is gradually added to an . ice-cold solution of 20% H2SO4. Na2O2 + H2SO4 --------> Na2SO4 +H2O2 Upon cooling crystals of Na2SO4·10 H2O separate out and the resulting solution contain about 30% … [Read more...] about Hydrogen Peroxide