Question

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Answer 1

Answer:

1 The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution. A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute

2 a Hydraulic Washing:

This method concentrates the ore by passing it through an upward stream of water whereby all the lighter particles of gangue are separated from the heavier metal ore. This is a type of gravity separation.

b Magnetic Separation:

This involves the use of magnetic properties of either the ore or the gangue to separate them. The ore is first ground to fine pieces and then passed on a conveyor belt passing over a magnetic roller. The magnetic ore remains on the belt and the gangue falls off

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Answer 2

Answer:

.A concentrated solution is one in which there is a large amount of substance present in a mixture. The degree of concentration is measured in moles..

.Methods of Expressing the Concentration of a Solution. The concentration of a solution can be expresses in a number of ways. The important methods are: It is defined as the amount of solute in grams present in 100 grams of the solution.

.35 /300 ×100

=11.666666