Potassium Chloride Lab Report

Potassium Chloride Lab Report - Seya

Introduction

The reason why we chose to test the solubility of 50ml of water at various temperatures is because KCL is known to have constant data and therefore leads to better results. The solubility of potassium chloride in water is due to ion-dipole interactions.

Research Question

Time needed for (2g) Potassium Chloride to fully dissolve compared to the temperature (20°C - 70°C) of the (50ml) Water.

Theory and Background

Both the quantity of KCl added to the water and the amount of water utilized affect how quickly it dissolves. The time needed for complete dissolve when 2g of KCl is added to 50ml of water may differ depending on the water's temperature.

The dissolution process would probably take

Conclusion

In conclusion, temperature is one of the factors that affect the rate of KCL dissolution in water. An increase in temperature leads to an increase in the rate of dissolution, which means that KCL would dissolve faster in hot water compared to cold water. The data is the best proof since at 20°C the Potassium Chloride took 25.4 seconds, but at 70°C it only took the KCL 6.23 seconds to dissolve in the 50 ml of water.

Explanation of Conclusion

The ions are hydrated as potassium chloride (KCL) dissolves in water. The charges on the K-plus and CL-minus are attracted to the polar water molecules. Ion-dipole forces draw polar

Individual K-plus and Cl- ions are penetrated by Water molecules that surround them, weakening the interionic interactions that hold the ions together and allowing the ions to disperse into solution as solvated ions. Ion-dipole interactions are hence responsible for potassium chloride's solubility in water.

Evaluation of Hypothesis

The outcome demonstrates that the hypothesis is valid. According to the idea, a greater temperature means a lower time in dissolution of KCL in water. The trend line in the graph is consistently descending. This validated the theory.

Evaluation

The strength in our experiment was that whilst one person was filling up the measuring cylinder with water and getting the stirrer ready, the other person weighed the potassium chloride and got it ready to put in the beaker. Therefore the strength of the experiment was teamwork.

Weakness

Improvement

The experiment took too much time since the Heater had to warm up from 0°C again every trial. But in the end we did actually get a second heater.

Next time we should use 2 heaters/stirrers from the beginning to speed up the long taking experiment.

Communication

The experiment was mostly waiting and less physical work and I would suggest picking a different experiment which isn't as time consuming and still has constant