National 4/5 chemistry everyday consumer products revision homework

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Uddingston Grammar School
Nat4/Nat5 Chemistry
Everyday Consumer Products: Homework 7

National 4

1. The grid contains the name of some chemical processes below.
A
Respiration
B
Fermentation
C
Filtration

D
Photosynthesis
E
Distillation
F
Cracking

a) Identify the process to separate alcohol and water.​​​1KU b) Identify the process in which chlorophyll absorbs light energy.​​1KU c) Identify the two processes in which carbon dioxide is produced.​1KU

2. Flowers produce a sweet tasting liquid called nectar. Nectar contains a mixture of sugars such as sucrose and fructose. a) To which family of compounds to sucrose and fructose belong.​​1KU
Glucose can be broken down to form alcohol in the presence of an enzyme.
b)
i. What is the chemical name for the alcohol produced.​​1KU ii. What is an enzyme?​​​​​​​1KU
iii. Give another example of an enzyme and its use.​​​1PS

3. In the manufacture of malt vinegar, starch reacts with water to produce​glucose. Glucose is converted to carbon dioxide and ethanol using an ​enzyme. Ethanol is oxidised, by bacteria, producing malt vinegar. ​​​

(a) Use the above information to complete the flow chart.

​​​​​​​​​​​​​​2PS
(b) The equation for one of the processes is:

C6H12O6 ® C2H50H + CO2

Balance this equation.​​​​​​​1PS

National 5

1. Sweets, such as pineapple cubes, contain the artificial flavouring methyl butanoate.
a) To what family of compounds does methyl butanoate belong to? ​1KU
Methyl butanoate can be broken down to form an alkanol and an alkanoic acid.
b) Name this type of reaction.​​​​​​​1KU
c) Draw the full structural formula for the alkanoic acid and the alcohol formed from the breakdown of methyl butanoate.​ ​​​​2PS
2. Ethanoic acid is more commonly known as vinegar.

a) Draw the structure of ethanoic acid.​​​​​1KU
b) Ethanoic acid can be reacted with methanol to form an ester, which is used as a solvent...
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