Evaporation and Crystallization Methods

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Questions and Answers

What is decanting and how does it separate insoluble solids from liquids?

Decanting is a crude method of separating insoluble solids from liquids, where the liquid is poured away and collected in another container, allowing the insoluble solid to settle down.

What is the purpose of a glass rod in decantation?

The glass rod assists in decantation.

What is filtration and what is its purpose in separating mixtures?

Filtration is a method of separating solids or groups of solids from a liquid in a mixture, using a filter paper.

How is the filter paper set up in the filtration process?

The filter paper is folded and placed onto the filter funnel. Signup and view all the answers

What are the filtrate and residue in the filtration process?

The filtrate is the liquid that passes through the filter paper, and the residue is the solid left on the filter paper. Signup and view all the answers

What is the importance of the size of the filter paper's pores in filtration?

The filter paper's pores should be smaller than the solid particles and larger than the size of the liquid molecules. Signup and view all the answers

What is the purpose of evaporating the solvent in a holding container?

To separate the solvent from the solute Signup and view all the answers

What is the requirement for a solution to undergo crystallization?

The solution must be supersaturated Signup and view all the answers

What is the initial step in the crystallization process?

Nucleation Signup and view all the answers

What is the process by which crystals grow in crystallization?

Crystal growth, where solute molecules or ions aggregate onto nuclei, forming larger crystals Signup and view all the answers

Why is evaporation not suitable for all solutes?

Some solutes can decompose when heated Signup and view all the answers

What is the benefit of using crystallization as a purification technique?

It is a versatile and widely used technique for purifying and isolating substances in solid form Signup and view all the answers

Flashcards

Decanting

A method to separate insoluble solids from liquids by pouring off the liquid.

Decantation - glass rod

A glass rod used to help in pouring of liquid during decantation