Observations in the lab

Observations

Hi everyone, today, my class had our second lab lesson.(technically the 3rd but the 2nd was just doing worksheets) This was the first time i ever used a test tube.

These are some chemicals we got to use!

For the first experiment we are to add vinegar to sodium bicarbonate and see what happens. It turned out that the water suddenly had a lot of bubbles and then rose before dropping.

For the second one, we used sodium carbonate and copper sulphate in separate test tube and here a picture, the one on the left is sodium carbonate with water and the other is copper sulphate and water.

We then mixed them together.

There was blue precipitate observed on top of in the solution.

For the 3rd experiment, we took a drop of liquid that felt like hand sanitiser as it felt cooling and evaporated relatively fast. I forgot what the name was i admit but i will try to update everyone when i remember.

For the 4th one, we collected about 10ml of limewater and blew a lot of carbon dioxide directly into it.

I forgot to take a video but i found one on youtube, enjoy.

http://www.youtube.com/watch?v=6HuyUxJBY3E

For the last experiment, we mixed starch with iodine solution.

We then observed that the iodine turned blue black almost instantaneously. Here's a video!

 

Thanks everyone! This is roughly what i learnt in the science class today! I think there is one more experiment so i will update you! Wish everyone a Happy Lunar New Year!

The Lab

The Laboratory

There are many things in the lab that we should know, here's a quick look at them.

There may be lots of dangerous objects that we should not touch, they are pasted with signs.

There are of course still a lot more of signs that tell us things are dangerous. But i don't wanna list the all down.

There are also a lot of apparatus in the lab. Some of them are the beakers, the conical flasks, the pipette and the burette. There are of course a ton more but i will not be able to list the down. Here is some pictures.

          So, what do you think, awesome right stick with me to find out more about what i will learn.

The Flames

Fire

Hi everyone, this post will be about flames and the lab as stated.

As we all know, fire, as of as far as we have learnt, there are 2 type of

flames, luminous and non-luminous flame( picture on the right ). The one

on the left is a luminous flame while the other one is non-luminous.

Here is a clip of how to light the bunsen burner.

http://www.youtube.com/watch?v=xEV3TPNw8W8 

Science Vs Technology

Science is the pursuit of knowledge that is used in everyday life and thus helps to improve technology to a higher level.

                                                     

Technology is the product of science that is used in our life to improve the quality of work, improve the speed of doing work, and also helps us in communication and the excellence of science which will in turn help technology as well.