Unit 22 P1, P2, M1, M2, D1, D2, P5, M5, D3– Applied Science
P1 – Follow a range of procedures to obtain substances by reacton and extractonn
M1- Describe the scientic principles behind the key steps in the preparatie methods for
substancesn
D1 – Explain how the yield, purity and atom economy of the substances prepared may be
affected by changes to the methods usedn
P2 – Follow methods to determine % yields, % purity and atom economy of prepared
substancesn
M2 – Describe the main problems with each of the preparatie methods usedn
P5 – Perform quanttatie analysis of commercial/natural substances by following giien
methodsn
M5 – Identfy sources of errors and uncertainty in the quanttatie analyses carried outn
D3 – Eialuate the reliability of the analyses of the commercial/natural compoundsn
Preparaton 1 - Separaton techniquesn Rock and Salt
Aim: To separate the salt from the rock and salt mixture which would then be used in order to
calculate its percentage yield.
Equipment:
- Rock and salt mixture
- Tripod
- Conical fask
-Stirring rod
- Balance
-Metal gauze
- Tongs
- Beaker
- Heating basin
- Bunsen burner
- Spatula
- Filter paper
Method:
1. Use the accurate balance to record the weight of the heating basin. Using a spatula fll a small
amount of the rock and salt mixture into the basin.
2. Place the mixture from the heating basin into a beaker and fll it with distilled water till the 100ml
line. Use the stirring rod to dissolve all of the salt in the mixture.
P1 – Follow a range of procedures to obtain substances by reacton and extractonn
M1- Describe the scientic principles behind the key steps in the preparatie methods for
substancesn
D1 – Explain how the yield, purity and atom economy of the substances prepared may be
affected by changes to the methods usedn
P2 – Follow methods to determine % yields, % purity and atom economy of prepared
substancesn
M2 – Describe the main problems with each of the preparatie methods usedn
P5 – Perform quanttatie analysis of commercial/natural substances by following giien
methodsn
M5 – Identfy sources of errors and uncertainty in the quanttatie analyses carried outn
D3 – Eialuate the reliability of the analyses of the commercial/natural compoundsn
Preparaton 1 - Separaton techniquesn Rock and Salt
Aim: To separate the salt from the rock and salt mixture which would then be used in order to
calculate its percentage yield.
Equipment:
- Rock and salt mixture
- Tripod
- Conical fask
-Stirring rod
- Balance
-Metal gauze
- Tongs
- Beaker
- Heating basin
- Bunsen burner
- Spatula
- Filter paper
Method:
1. Use the accurate balance to record the weight of the heating basin. Using a spatula fll a small
amount of the rock and salt mixture into the basin.
2. Place the mixture from the heating basin into a beaker and fll it with distilled water till the 100ml
line. Use the stirring rod to dissolve all of the salt in the mixture.
