Question

4. The reaction of acetylene with dilute permanganate may be used as a test for unsaturation. Write a balanced equation for the reaction of ONE MOLE of this reagent with acetylene. Write a balanced equation for the reaction of TWO MOLES of this reagent with acetylene. 5. Cuprous acetylide and silver acetylide are very explosive solids. Write the balanced equation for the preparation of each. The ( explosiveness of each precipitate was shown by its action on the hotplate. What is the equation for the explosion (reaction with oxygen) on the cuprous acetylide? of the silver acetylide?

Answer 1

4. Glyonal Acetylene one mole, dilute permanganate Here we wepo tanium permanganate = KMnou acid , oxalic two mole dilute permanganate OH OH KMnOy (amole) C- HCECH Acetylene HH -16-240) (Glyonal) COOH . KM nou (Amole) H EH KMnoy HC = CH Acetylene (amole) COOH Oxalicacia 5. Cuprous acetylide preparation? Acetylene is treated with copper (1) chloride solution in the presence of ammonia. C2 H₂ + reucl = cuG + 2HCl Cuprous acetylide Explosive reaction: Cusacs) y 2ouls) +20(s) Silver acetylide preparation: Acetylene is passed through silver nstrate. 2 A8 NO₂ (aq) + C₂ H₂ (8) = Ag G cs) + 2 HNO3(aq) Silver acetylide Explosive reaction: Ag, GCS) & 2Ag (5) + 2 ces)