Fermentation

Question 1

Glucose

Answer 1

C6 H12 O6

Question 2

Ethanol

Answer 2

C2 H5 OH

Question 3

What temperature do water and ethanol boil at?

Answer 3

Ethanol-78 degrees

Water-100 degrees

Question 4

What happens to enzymes when they become too cold?

Answer 4

They will be come inactive

Question 5

What happens to enzymes when the temperature is too hot?

Answer 5

The enzymes need to be a specific shape and size to work. When heated too much their shape changes irreversibly and they become denatured.

Question 6

What are the ideal temperatures for yeast/ enzymes to work

Answer 6

25 degrees to 50 degrees Celsius

Question 7

How is ethanol separated from the solution.

Answer 7

By fractional distillation, as ethanol and water have different boiling points.

Question 8

What alcohol do most alcoholic drinks contain

Answer 8

Ethanol

Question 9

What is an enzyme

Answer 9

A natural catalyst which is a protein (made out of amino-acids)

Question 10

Word equation for fermentation

Answer 10

Glucose = carbon dioxide + Ethanol

Question 11

Symbol Equation for fermentation

Answer 11

C6H12O6 = 2(CO2) + 2(C2H5OH)

Question 12

Why is an alcohol NOT a hydrocarbon?

Answer 12

Because it contains oxygen atoms are bonded to the carbon and hydrogen atoms

Question 13

How fast is a fermentation reaction

Answer 13

Fairly slow