Mixing + Dissolving

For today's 2 hours of science, we started looking at a new topic of mixing and dissolving! To get a better understanding of this topic we conducted an experiment. During the experiment, some keywords came up like "mixture" which is a substance made by combing either substance together, some examples of mixtures being, Tea + Coffee, Coke, Cake, Sand, Salad, etc. Another keyword that came up was dissolving which is what our experiment was based around. Dissolving is when a substance becomes part of a liquid, lots of things affect the rate that something dissolves for example when the water is hot the water particles move around faster which means that the particles collide more, compared to cold water that doesn't move as much making it take longer for particles to diffuse. But not everything dissolves and there are two special names, Soluble which is a substance that can dissolve in water, and Insoluble which is something that cannot dissolve in water. 

THE EXPERIMENT - 

AIM -  To find out what method makes sugar dissolve in water faster. 

EQUIPMENT - 
- Beaker 
- 100ml cold water 
- 100ml hot water 
- Sugar 
- Spatula 

METHOD - 

1 - Fill the beaker with 50ml of cold water x 2 / 50ml of hot water x 2 ( Do the experiment 4 times ) 

2 -  add one scapula of sugar 

3 - For the first time doing cold and hot water mix the sugar in the beaker

4- Time how long it takes for the sugar to dissolve in both the hot and cold water

5 - Complete the same thing but this time doesn't stir the sugar and see the time difference. 

RESULTS - 

CONCLUSION - 

In the end, the 2nd experiment dissolved the quickest as it had hot water which meant that the water particles moved around quicker due to the kinetic energy and the stirring helped the sugar dissolve quicker. Compared to the 4th experiment where it was cold water and no stirring, which ended up taking 2 minutes to dissolve.