Turbo Charge Learning Jump Start

A 2 hours talk by Webster Ku, title: Turbo Charge Learning Jump Start.

Here is a promo video published by the speaker.

All the form 6 students were to attend this talk. Students seemed to enjoy themselves and had fun with the speaker Webby. Students were said to be motivated to study smart, with the skills suggested and led by Webby, a funny speaker with his optimism and jokes. Grateful to have the time spent with Webby.

Determination of the Percent Oxygen in Air

The experiment for today is determination of percent oxygen in air. Here is a video  as reference.

[Source: http://www.youtube.com/watch?v=xQNl2EdteDE ]

What’s going on?

Air is composed of Nitrogen - about 78%, Oxygen

about 21%, Argon about 1% and other gasses.

These gasses compose 100% of the air so they exert

100% of the pressure. IN the test tube, at the

beginning, there was the same pressure inside the

test tube as outside. As the steel wool started to

rust*, the oxygen was taken out of the air, therefore

the pressure was reduced. Over time, the pressure

was reduced by the percentage of oxygen

removed…. about 21%. As the pressure drops, the

pressure on the outside of the test tube pushes the

water level up inside the test tube.

Source