Symbols, Formulae And Equations

Question 1

How to write out the formula of ionic compounds

Answer 1

Write the elements symbols
Add the elements charge
Swap the charge to be the amount of the other element

Question 2

Anions are?

Answer 2

Negative ions

Question 3

Cations are?

Answer 3

Positive ions

Question 4

How to balance symbol equations

Answer 4

Make sure the amount of each atom of each element is equal on both sides

E.g Ca + O2 —> CaO

     Balances too

 2Ca + O2  —>   2CaO

Question 5

Pattern of reactions for - Metal +oxygen

Answer 5

Metal + Oxygen = Metal oxide

Question 6

Pattern of reactions for - Metal + cold water

Answer 6

Metal + Cold Water = Metal Hydroxide + Hydrogen

Question 7

Pattern of reactions for - Metal + steam

Answer 7

Metal + steam = Metal oxide + Hydrogen

Question 8

Pattern of reactions for - metal oxide + acid

Answer 8

Metal oxide + acid = salt + water

Question 9

Pattern of reactions for - Acid + Base ( what is this reaction called)

Answer 9

Acid + base = salt + water (Neutralisation Reaction)

Question 10

Pattern of reactions for - Metal Carbonate + Acid

Answer 10

Metal Carbonate + Acid = Salt + water + Carbon dioxide