Short Answer Questions.
1. How are the following mixtures separated?
(a) Sugar and sand (b) Oil and water (c) Cream from milk
(d) Iron sulphide from mud
Answers
Explanation:
(a) Sugar and sand (b) Oil and water (c) Cream from milk
(d) Iron sulphide from mud
Answer:
(1). The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.
(2). Two immiscible liquids, oil and water, can be separated by using Separating Funnel. The process involves using the mixtures of unequal particle density. Because water is denser than oil, it can be separated by means of the funnel and left in the funnel with an oil layer.
(3). Cream from milk can be separated by the method centrifugation. It is a way of getting out a chemicals mixture, which are in gas/liquid form, by getting them slowly adding another compound, which is basically a liquid/solid
(4). Evaporation uses relatively low boiling point of water to separate it from the other compounds. To get the water you would need to place the muddy water in a sealed container with a spout at the top. Attach one end of a hose to the spout and put the other end in a glass.