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IdioticHolly
science cba1: clueless

I have to start preparing for my science CBA 1 soon, and I have no idea what I'm going to do, can anyone help my completely unimaginative mind come up with an idea?


8 Comments
MollyMcCann
Hi, I did my CBA1 last year and the project in my class that got exceptional was "Does the Ph of a substance affect how much of it is needed to neutralise an acid/base" So basically, will a little bit of very acidic substance neutralise a lot of a slightly basic substance. It was a simple enough experiment and it was easy to do in class.
IdioticHolly
hey, can you tell me a bit more about how that was done?
Vishnu
Vishnu
hi i did "Does Ph increase the boiling temperature pf a liquid"
Vishnu
Vishnu
It was simple
MrKnowitall
I also got exceptional and I demonstrated the effects of endothemric and exothermic reactions on their enviroment. I basically carried out a two of each type of reaction in a beaker inside a water bath and noted the temperature before and after the reaction, leading to a simple conclusion that surprisingly endothermic lowered the temperature outside and inside the beaker as a whole despite absorbing heat into the beaker, and exo raised the temperature inside the beaker despite leaving the energy out. A very interesting, educational conclusion emmerged and alongside a six page write up earned me an exceptional, but if you're not arsed you can do half that and get above expectations lol.
alternatingcurrent
MrKnowitall, could you please say more detailed steps about how you did this experiment? I'm very interested in doing this for my CBA and any more info would be greatly appreciated, thanks!
MrKnowitall
This was 4 years ago now, so my memory is a bit faded but essentially your write up stands as is with your hypothesis, equipment, procedure, observations and conclusion and a graph or two for presentation. The main experiment was carrying out two exothermic reactions in a beaker, which was also in a water Bath and then two endothermic reactions also in beakers in water baths to see how they affect the environment. My hypothesis was simply that since endothermic absorbs heat, it would cool the water Bath while exo would lose heat and heat the water Bath. I can't remember the conclusion but I remember it contradicted my hypothesis and allowed me to do a few sentences on evaluation for the future, which examiners like. In terms of what endo and exo reactions to perform, talk to your teacher, mine helped big time. Your teacher may get the gyst of what I'm on about here, I haven't done it in years but it was 'the effects of endothermic and exothermic reactions on their environments.'
alternatingcurrent
Thanks a million man, I really appreciate it
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