Suppose you weighed 2.003 g sample of a mixture of NH,CI, NaCl, and Sio, Acciden

Question

Suppose you weighed 2.003 g sample of a mixture of NH,CI, NaCl, and Sio, Accidentally you dropped a small amount of the sample on the floor. Nevertheless, you decided to carry out the experiment without further weighing the mixture. How would the individual mass percentages of NH,C1, NaCl, and SiO2 be affected? In this experiment you separated NH,CI, NaCl, and SiO2 from the mixture of NH,CI, NaCI, and SiO2 using sublimation and decantation. Name some other methods chemists use in the laboratory to separate components from their mixture.

Explanation / Answer

The individual mass percentages would be less than the actual mass percentages. This is necause some amount of the mixture is lost when a small amount of the solution is dropped on the floor. Hence, the mass percentages would also decrease.

Some methods to separate mixtures are:

Filtration- To separate an insoluble solid from a solvent.

Separating funnel- To separate two immiscible liquids.

Simple distillation- To separate a liquid from a solution.

Fractional distillation- To separate two miscible liquids.

Evaporation- To separate a soluble solid from a solvent.

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