A) Drying Agent
Both Quicklime and Conc. Sulphuric acid has strong affinity for water molecules
and thus they are chemically used as drying agents for many compounds. As such,
many are used as a drying agents to dry gases. E.g. remove water vapour content
from air or gas mixtures in the laboratory. Hope this answers your questions. I don’t
O level you have to go too in-depth of the mechanism.

B) Intensive Revision Programs
The March program went well and the students in the class enjoyed themselves whie
learning the ropes for several Sec 3 fundamental topics.

After the Mid-Year Examinations, my intention is to open up two Intensive Revision
Bootcamp for Chemistry.

a) Sec 3 Syllabus Intensive Bootcamp – Sec 3 and 4 students can attend
b) Sec 4 Syllabus Intensive Bootcamp – Sec 4 graduating students to attend

It will be about 3 to 6 hrs kind each day. I am looking into the details now such as
venue, size of class, hrs each day in order to complete revision, etc.

Do stay tuned to the posts in this Chemistry Blogsite as i will be mentioning it.
There will be a closing registration dateline so that i can know the number of students
participating and i can then focus on preparing the quality contents / notes / activities
to benefit the students.

Hope this information helps.
Sean

Could you tell me how drying agents like quicklime (calcium oxide), concentrated sulphuric acid work?

How do they dry gases?

Looking forward to your sec 4 intensive lessons.

Thank you!