Evaporation as a Method of Separation

Q. A mixture of hexane and water was shaken and left to separate as shown in the diagram below: State the identity of; (i) P, (ii) W

Q. A sample of copper turnings was found to be contaminated with copper (II) oxide. Describe how a sample of copper metal can be separated from the mixture

Q. Copper (II) oxide and charcoal are black solids. How would you distinguish between the two solids?

Q. A mixture contains ethene, Hydrogen and ammonia gases. Explain how a sample of hydrogen gas can be obtained from this mixture.

Q. A student left some crushed fruit mixture with water for some days. He found the mixture had fermented. He concluded that the mixture was contaminated with water and ethanol with boiling point of 100°C and 78°C respectively. The set-up of apparatus below are used to separate the mixture. Name the piece of apparatus labelled W ...

Q. The set-up below was used to separate a mixture. Name the apparatus missing in the set-up. Give one example of mixture T. What is the name of this method of separation?

Q. Sam, a form one student at Heru academy accidentally mixed sulphur and iron filings. Suggest an appropriate method of separation you would advice him to use to separate the mixture...

Q. Majaliwa, a form one student at Kanga High School wanted to separate and obtain iodine and sodium chloride (common table salt) from a mixture of the two. he set the experimental set up shown below. the mixture was heated for some time and left to cool. On cooling, shiny black crystals and white crystals were observed on the surface of the watch glass and in the beaker respectively...

Q. What is a mixture? State two physical means of separating a mixture.

Evaporation as a Method of Separation