Tuesday, October 5, 2010

Its a Lab!!!!

yay our first lab yesterday! it was terribly exciting, mixing salt into water. no i'm serious it was awesome!


The point of the lab was to find the saturation level of salt in 10ml, 20ml, 40ml, and 50ml of water. We started by donning our lab coats and goggles. so stylish!


next we got out everything we would need for the experiment:
salt
water
scale
wax measuring paper
a 50ml beaker
a scoopula
a glass stir rod
a graduated cylinder

to start off we measured a pile of salt(roughly) onto a piece of wax paper that was sitting on the scale. We then zeroed the scale by pressing zero. What this means is that now instead of the weight of the salt showing on the screen and subtracting everytime we took away salt, the number would start at zero instead and get higher, telling us exactly what we had taken away.
the next thing to do was to measure out 10ml of water in the graduated cylinder and transfer it to the beaker. we then started to add salt and mix it in until it looked like this:


Once we could see a deposit of salt on the bottom that was not being dissolved, we realised that we had reached the saturation level. The number on the scale showed how many grams to the hundredth of a gram were in the water.


then we wrote down the number, emptied and cleaned the beaker, zeroed the scale, and did it all over agian with 20ml, 40ml, and 50ml of water.
ta da!

No comments:

Post a Comment