Ethanoic acid test.

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Presentation transcript:

Ethanoic acid test

3 reactants needed Name process and how long. Draw diagram of apparatus Equation State and explain colour change Which reactant in excess? Limiting reactant? Name 2 Impurities and how are they removed? pH of ethanoic? Why? Where is this reaction used in everyday life? Name the oxidising agent.

3 reactants needed [3] Cr2O72- / H+ / C2H5OH Name process and how long.[2] Reflux / 30 mins Draw diagram of apparatus [6] Equation [2+2] 3 / 2 / 16 = 3 /24 /11 State and explain colour change [5] amber / to green / Cr (VI) / reduced / to Cr3+ Which reactant in excess? [1] dichromate Limiting reactant? [1] ethanol Name 2 Impurities and how are they removed? [4] water / anhydrous Na2SO4 / shake 5 mins / filter / ethanol / fractional distillation pH of ethanoic? Why? [2] 4-5 / weak acid Where is this reaction used in everyday life? [1] breathalyser Name the oxidising agent. [1] dichromate [30]