Acids and bases

Question 1

What are molecules, atoms and elements?

Answer 1

Molecules: A group of atoms bonded together
Atoms: the smallest particle of a chemical element that can exist
Elements: Defined a substance that is made completely from one type of atom.
E.g. The hydrogen element is made from atoms that contain a single electron and a single proton.

Question 2

What colour do acids show up as in an cabbage indicator?

Answer 2

Red

Question 3

What colour do bases show up as in an cabbage indicator?

Answer 3

Blue

Question 4

Name some acids.

Answer 4

HCI, H2SO4

Question 5

Describe how you made an cabbage indicator.

Answer 5

Cut the cabbage into pieces so it fits into the beaker, and add minimum amount of water needed. Heat the cabbage until it’s at it’s boiling point under the blue light of the bunsen burner and it will turn into hot liquid. Leave it to cool for about 10 minutes and then filtre the liquid from the cabbage through a filtre paper.

Question 6

What are the reactant and products of the following experiment: Magnesium mixed with hydrochloric acid form hydrogen and magnesium chloride.

Answer 6

Reactants = Magnesium and HCI
Products = Hydrogen and magnesium chloride