Science Experiments

Archive for the ‘Water Experiments’ Category

Question: Help with chemistry experiment?

I need to design an experiment for this project.

Experiment:
You are provided with a mixture, M of two solids. One of the solids in mixture M is soluble in water. Describe how you would carry out an experiment to separate the solids in mixture M and produce a sample of the soluble solid.

Please tell me with steps and the results obtained. Thank you!

Answer: It would seem to me that…

1. Add water to the total solid until it appears that no more is dissolving.
2. Filter off the insoluble solid.
3. Vacuum distill the filtrate until most of the water is removed into the collection flask. You should be left with solid in the distillation flask and a bit of water (NEVER distill to dryness since doing so can cause an explosion). If you need the solid completely dry, let water evaporate for a while (or, boil it off)

ELectrolysis of Water | Pakistann Science club | Chemistry Experiments |

Question: How do I extract water from hydrogen peroxide and get purer peroxide?

The question might be a bit vague, but I have a bottle of “3% Hydrogen Peroxide” with the additional ingredients being water. For a science experiment, I think purer peroxide would make my experiment more successful. Any ideas?

Also, if I had 100% peroxide, would that remove the “Hydrogen” from “Hydrogen Peroxide?”

Thanks.

Answer: If you have to pure of peroxide it is very dangerous it can burn severely, check out http://en.wikipedia.org/wiki/Hydrogen_peroxide & http://en.wikipedia.org/wiki/Peroxide
You can get 35 % food grade hydrogen peroxide in some health food stores & some pharmacies.
Good luck

Fun Science Experiments : How to Build a Water Rocket

Question: What is that one science experiment where you create runny, yet solid substance?

It was a really cool project that I did in 7th grade.
For some reason it was blue.. I can’t remember why.

Its some stuff you mix together (I THINK it involved corn meal and vinegar, but i’m not sure)..

Its a runny substance that appears to be a liquid, but when you touch it, its solid! Its really cool.You can throw it on a table and it’ll spread like water, but when you touch it, its hard.

Anyone know what it is and how its made?

Answer: You’re thinking of cornstarch goo.
It’s made of just cornstarch (not corn meal!) and water. Just take some cornstarch and gradually mix in water until it’s the desired consistency. If it was blue in 7th grade, it was because you added food coloring.

Cornstarch Walk on Water – Cool Science Experiment