fdghfjhkljl;l;'

1. Chemistry pbl MADE BY: DHRUV KAPUR XI-C

2. Topic * PREPARATION & PROPERTIES OF HYDROGEN PEROXIDE

3. Before discussing the PREPARATION & PROPERTIES of Hydrogen Peroxide… Let’s Know … What is H2O2 Hydrogen peroxide is a combination of hydrogen and oxygen. Its chemical description is H2O2. In high concentrations, it can be unstable and even poisonous. In lower concentrations, such as the types found in many homes, it works well as a disinfectant and antiseptic. Uses of H2O2…… 1) In homes, clinics and schools, it has frequently used to cleanse cuts, abrasions and other minor injuries. 2)Hydrogen peroxide has many other uses as well. When diluted, it can be used to clean and whiten teeth, and it can be used as a gargle or mouthwash to kill germs in the mouth. NOTE:-“Hydrogen peroxide should never be swallowed. The residue from it should be rinsed from the mouth after use. ”

4. PREPARATION OF HYDROGEN PEROXIDE Preparation of hydrogen peroxide IS DONE IN 3 WAYS... P R E P A R A T I O N 1) Acidifying barium peroxide 2) Hydrolysis of Peroxodisulphate 3) Auto oxidation of 2-alklylanthrquinols

5. METHOD 1… Acidifying Barium Peroxide Acidifying barium peroxide and removing excess water by evaporation under Reduced pressure gives hydrogen peroxide BaO2.8H2O(s) + H2SO4(aq)--->BaSO4(s) + H2O2(aq) + 8H2O(l) We get Hydrogen Peroxide in aqueous state.

6. METHOD 2… Hydrolysis of Peroxodisulphate Peroxodisulphate ,obtained by electrolytic oxidation of acidified sulphate Solutions at high current density ,on hydrolysis yields hydrogen peroxide. Electrolysis 2HSO4-(aq)------------> HO3SOOSO3H(aq) Hydrolysis HO3SOOSO3H(aq)---------->2HSO4-(aq) + 2H+(aq) + H2O2(aq

7. METHOD 3… Auto oxidation of 2-alklylanthrquinols Industrially it is prepared by the auto –oxidation of 2-alklylanthrquinols

8. After extracting hydrogen peroxide…NOW its time to discuss PROPERTIES OF HYDROGEN PEROXIDE P H Y S I C A L P R O P E R T I E S

9. Chemical Properties of Hydrogen Peroxide Chemical Reactions of hydrogen peroxide Some of the more significant reactions of hydrogen peroxide are listed below. • Decomposition 2H2O2 -> 2H2O + O2 • Molecular addition H2O2 + Y -> YH2O2 • Substitution H2O2 + RX -> ROOH + HX • Oxidation H2O2 + W -> WO + H2O • Reduction H2O2 + Z -> Z H2 + O2

10. MADE BY: DHRUV KAPUR XI-C ROLL NO: 8