just fast forward to 3:43 and you can see SC6. I am the first row, fourth guy from the left of the cadets. but cannot see carefully lah... chem test is screwed... i forgot that hydroxide was OH- and didnt know that silicate was... forgot liao... anyway should be able to get a 4.0 unless there were other mistakes... I NEED TO GET 4.0 FOR THIS PAPER IT IS 10%!!! sucks to the core...