Alcohols

Question 1

Define biofuel

Answer 1

Fuel made from biological material that’s recently died

Question 2

Advantages + disadvantages of biofuel

Answer 2

(+) Renewable energy source

(+) Carbon neutral

(-) Petrol car engines have to be modified

(-) Land can’t be used to grow food

Question 3

Aldehyde general formula

Answer 3

C_nH_2nO

Question 4

Carboxylic acid general formula

Answer 4

C_nH_2n+1COOH

Question 5

Alcohol + [O] → Aldehyde/ketone + water

Answer 5

Acidified potassium dichromate

Distillation

Orange Cr₂O₇^2- → Green Cr³⁺

Question 6

Alcohol → carboxylic acid

Answer 6

Excess acidified potassium dichromate

Reflux

Question 7

Outline the process of reflux

Answer 7

• Heat ethanol w/ acidified potassium dichromate
• Round bottomed flask w/ anti-bumping granules
• Liebig condenser
• No lid