Hurumanu 3 - Chemistry Mixing and dissolving

 Hello everybody, so today we are learning about Mixing and dissolving, we have to find how who move faster in what temperature. 

What are the ideas from today? The idea for today is to mix and dissolve or to know what temperature to dissolve the sugar first. 

What factors effect dissolving?

Experiment: Aim, method, result

Aim: Rate of dissolving depending on temperature and stirring. 

Method: In this experiment, we have to have 2 beakers one is small and one is big. We also need a spatula to put the sugar in the water and also for mixing. The first one we did was to put the big beaker cold water and this has to be in 50ml, We have to stir it, We also have to time it the same as we put the sugar and stop when the sugar has dissolved. The second one is the same thing but we have to put hot water, it also has to have the same water as the first one and the amount of sugar we put. The third one is the first one but we can't stir it. The fourth one is the same as the second one but we also don't need to stir it.

Total and average time: Coldwater + mixed= (total) 490sec (average) 70sec |  Hot water + mixed=(total)  213sec (average) 27sec | Coldwater + No stirring=(total) 622sec (average) 24.4sec |  Hot water + No stirring= (total) 590sec (average) 98sec

Why the result happened? 

The hot water gives more energy to the particle and moves around more and the cold water make it slower and that's why the cold water is taking a long time to dissolve.