Investigate a factor affecting the solubility of salt
How does the density of the solvent affect the solubility of salt?
Purpose
The purpose of this experiment is to determine how the density of the solvent affects the solubility of salt. The density of any solution, will definitely affect the manner and rate at which the salt will dissolve. For this reason, the solubility of the salt will take different time rate to dissolve into diverse solutions.
Hypothesis
In this case, the hypothesis for this experiment will be a proposed solution to solve the problem affecting the solubility of salt and how it is affected by density of the solvent. For instance, the reason behind the density of the water affecting the solubility of the fluid should be investigated. For this reason, the hypothesis in this case can be defined as the effect of increased density of the solubility of water. The impact of density can be denoted on the solvent and how it assists or reduces in the solubility of salt.
Control and variables
The control experiment in this case can be using diverse fluids that have diverse densities to determine the impact of the density on the solvent of the salt. Diverse liquids with varying densities can be used to ensure that the experiment is well conducted. Other factors that might affect the experiment such as temperature and humidity should be kept constant. The independent variable in this case will be the fresh and clean water. This will be used as the control experiment. Where salt will be dissolved into the water and other aspects will be assumed constant. The dependant variable in this case will be the other fluids which will be used such as replacement of the water with grease and oil fluids.
Materials
Various materials are needed to ensure that this experiment is well carried out to avoid the students from obtaining miscellaneous results. The necessary materials needed for this case encompass:
• 5ml of water
• 5ml of oil
• 5ml of grease
• 5ml of Ethanol
• Sodium chloride solution
• 5kgs of salt will be needed
• 4 spatula are needed
• Stopwatch is needed
Procedures
• Clean and dry the beaker
• Pour 5ml of the water in the beaker
• Pour 5ml of grease in a clean
• Pour 5ml of oil in a different beaker
• Add 10 spatula of the salt in each beaker respectively
• Stir and use the stopwatch to time the time interval.
• Record the diverse time interval obtained for the different fluid respectively.
Measure equal amounts of 50ml of the diverse fluids that are readily available into different beakers. The beakers need to be clean and well labeled to reduce confusion during the experiment. An equal amount of five spatula of salt should also be dissolved into the solvents separately. The duration of the solubility should then be measured according to time that the salt will take to dissolve into the fluid. Each of the results should then be recorded differently to ensure that there is no confusion in recording the results. The end results obtained should then be compared with that of the control experiment.
Conclusion and evaluation
The density of the fluids usually increases the velocity of the solvent hence making it almost impossible for salt to dissolve in the liquid. When the density of a fluid is high, the velocity will definitely rise irrespective of the surrounding aspects such as temperature. This will reduce the rate at which the salt will dissolve in the fluid. Salt usually dissolve faster in water for the key reason that the molecules are far apart.
Since the molecules are far apart, the molecular force between the particles of the liquid is weak hence; the salt will take less time to dissolve. However, fluids with high density usually have intense molecular force that attracts the molecules close to each other. For this reason, the solubility of salt will take long since here is resistance from the particles. Therefore, if the molecules of the fluid are highly bounded together, the salt cannot be dissolved easily. For instance, the solubility of salt in fluid such as oil and grease is low as compared to that of solubility in water.
