Friday 22 Jan

Today during science lab lesson we did an experiment with agar by soaking it in hydrochloric acid to see the change of colour as the hydrochloric acid .the experiment is to find out if surface area affects the rate of diffusion .It was our first trip to the lab for the year as the lab was reserved for the upper secondary students. The agar look really delicious but the agar there is inedible as it was filled with some lethal poison that will cause you to be paralyzed. The lethal poison was said to be used to for preserving the products in the lab.
Timothy keep saying that he want to eat the agar although it was meant to be meant to be a joke but till it triggers the desire of one to try it. But the fact is the agar looks really delicious, anyway we went on to cut the agar according to different dimensions and place it into the hydrochloric acid and see how long does it take for each block to change from milky white to pink completely and depending on the time to see if different surface area affects the rate of diffusion. We waited for a really long period of time for it to change colour, as the instruction says that the how agar block much change into pink colour before we can take it as the result. The one that took the longest was the 1cm by 1cm by 1cm agar cube it took us about six and a half minutes just to turn pink.