Chemistry is focused on materials the world is made of and their reactions.[br]It is important to distinguish between different substances.
Salt, sugar, citric acid (solid), (backing) soda (or backing powder), flour (or starch)
Pour out a little bit of every substance and look at them closely. All of them are white crystalline substances, but they differ slightly.[br][br]One way to distinguish between them easily is by their taste![br][br]Taste a tiny bit off all of the substances - not to much or you will feel ill - and assign the correct taste to them.
The different substances look similar.