Investigation Completion and Analysis

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Task 2

The poster reports on the investigative techniques used in separation of the soluble solute in a solvent. In this experiment, the solute is salt, and the solvent is water. The techniques used include evaporation, distillation, and crystallization.
Techniques used in the investigation
1. Evaporation

Evaporation is a process where liquid is converted to vapor with the purpose of separating it from a dissolved solid or from a liquid that is higher in boiling point in experiments or investigations on how to separate soluble solid in liquids (Holland, 2005). Evaporation technique was chosen for the experiment because it is easy and simple to execute compared to other methods of separation such as distillation.
2. Distillation

Distillation is an investigative technique used in separation of mixtures based on conditional and differences required to change the components phases of the mixture. It can be applied in a mixture of liquids, and the mixture of soluble solutes and solvents like in this experiment. During the distillation process, the water is heated into the gas phase of the vapor leaving the salts deposits, then condenses back into liquid form that is then collected. The process is then repeated again to improve the water purity (Porteous, 2010). This method was obtained because pure water can be obtained
3. Crystallization

This technique is a process of solid crystals formation from a solution. This technique is a technique of separating solids and liquids in which transfer of solute from a solution to a solid crystalline which pure occurs (Jones, 2002). This method was chosen because pure solutes can be obtained
Modifications made and justification for the changes
1.         In evaporation, I applied some heat from flames to the containers holding solution of water and salt. I applied the heat to increase the rate of evaporation instead of leaving it open in the air and under the sunshine that is slow
2.         I used ice in the condenser to condense maximum amount of vapor. Moreover, I re-distilled the condensed water to get maximum dissolved salts again
3.         In crystallization, I left the crystallization process to proceed slowly undisturbed instead of fast cooling. This was to prevent impurities from getting attached to the salt.............


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