Suggest physical changes by which the following mixtures can be separated. (a) iron filings and wood chips (b) ground glass and sucrose (cane sugar) (c) water and olive oil (d) gold flakes and water

Short Answer

Expert verified
Iron filings can be separated from wood chips using a magnet. Ground glass can be separated from sucrose using water and then filtering off the ground glass. Water and olive oil can be separated using a separating funnel. Gold flakes can be separated from water using decantation and subsequent filtering.

Step by step solution

01

Separation of Iron Filings and Wood Chips

A magnet can be used to separate a mixture of iron filings and wood chips. Iron is magnetic while wood is not. So, when a magnet is run over the mixture, the iron filings are attracted to it while the wood chips are not afftected.
02

Separation of Ground Glass and Sucrose (Cane Sugar)

Water can be used to separate a mixture of ground glass and sucrose. Sucrose is soluble in water while glass is not. So, when water is added to the mixture, the sucrose dissolves forming a solution while the ground glass can be filtered off.
03

Separation of Water and Olive Oil

A separating funnel can be used to separate a mixture of water and olive oil. Water and oil are immiscible, forming two distinct layers with water being denser. By opening the stopcock of the separating funnel, the water will pour out first, leaving the oil behind.
04

Separation of Gold Flakes and Water

A filter or sieve can be used to separate a mixture of gold flakes and water. Gold being far denser than water will not float but rest at the bottom. By carefully decanting (pouring off the liquid), most of the water can be removed. The remaining gold flakes can be obtained by carefully filtering the remaining liquid.

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