PREPARATION OF MIXTURE & COMPOUND
Objective: To prepare (a) mixture and (b) a compound using iron filings and sulphur powder and distinguish between these on the basis of:
(a) Appearance (homogeneity and heterogeneity); (b) Behavior towards magnet
(c) Behavior towards Carbon disulphide (CS2); (d) Effect of heat.
Requirements: China dish, test tubes, test tube holder, mortar and pestle, watch glasses, magnet, Bunsen burner, iron filings, tripod stand, wire gauze, sulphur powder, CS2 etc.
Procedure:
1. Take 7 g of Iron filings and 4 g of sulphur powder and mix them well using mortar and pestle. Transfer half of this into watch glass no-1
2. Take half of this mixture in a china dish heat strongly on a Bunsen burner (Use tripod stand and wire gauze) till the mixture starts to show a red glow.
3. Cool the mixture, and grind into fine powder using a mortar and pestle.
4. Transfer the powder to watch glass no-2.
5. Perform the following experiments with the samples you have in both the watch glasses.
Properties of mixture of iron &sulphur

Properties of compound of iron &sulphur

Precautions:
1. Heating of the Fe & S mixture should be done with extreme care.
2. While performing the experiments, use only very little quantity of the samples.
3. Use china dish for heating the mixture.
Questions:
1. Name the compounds formed when the following chemicals react:
a) Hydrogen and Oxygen b.)Mg and S
b) S and Fe d)Fe and Cl2.
2 Classify the following into homogeneous and heterogeneous mixtures.
a) Sand and saw dust b) Sugar dissolved in water.
c) Milk d) Powders of Fe and S
3 Suggest suitable physical methods to separate the following mixtures:
a. Fe and S Magnet
b. NaCl and water Evaporation/Boiling
c. Sand and water Filtration
4 Classify the following into compounds, elements and mixture:
a. Air b. CO2 gas, c. Fe metal d. S powder f. Sugar solution e. Ethane
f. Fe + S g. NaCl h. SO2 gas. i. H2S gas j. Ammonia gas k. Milk
Multiple choice type questions

Please click on below link to download CBSE Class 9 Science Lab Worksheet Preparation of Mixture and Compound