Chemical indicators

Chemical indicators change color in the presence of acidic or a basic substances.

Two common indicators used to make disappearing ink are phenolphthalein and thymolphthalein.


Chemical reactions

Understanding the general types of chemical reactions will help you to write and balance chemical equations.


Physical states of matter and symbols

All physical states are given at standard temperature and pressure for each chemical species.

(aq) = aqueous solution (dissolved in water, from aqua or water).

(l) = liquid

(s) = insoluble solid or precipitate.

(g) = gas


There are a number of simple chemical formula involving the mole concept.

"The mole of fortune" helps chemistry students to see the relationship between these formula.


Molar Mass

Formula Calculator

Atar Calculator

An ATAR calculator for NSW HSC Chemistry students.

Try the Chemistry Quiz!!