We learnt simultaneous equations. YAY

Then we had Computer Sci, and since Ms Sheela was missing, a replacement teacher came in to talk about local matters, like the four classmates who were washed down a canal. But he wouldn't play chess with me.Dang it!

Then we had an acids and alkalis practical test. w00t! Not everyone was as enthusiastic though XP. I mixed a one of everything: 3 unknown chemicals, calcium hydroxide, calcium carbonate, methyl orange and a LOT of universal indicator. The solution turned red and there was a effervescent of a colourless gas. w00t
Ca(OH)2 + CO2--> CaCo3 + H2O