Formula And Equations

Question 1

What are ionic compounds

Answer 1

Ionic compounds are compounds made up of oppositely charges ions.

Question 2

If a compound is neutral what does this suggest about the charges inside the compound

Answer 2

This suggests there must be an equal amount of negative and positive charged ion

Question 3

How can we work out a formula of a compound

Answer 3

This can be done by identifying the charges on the ions using the periodic table and balancing the charges appropriately

Question 4

What ions will be formed from a element in the groups:1,2,3 5,6,7

Answer 4

They will form:1+,2+,3+ 3-,2-,1-

Question 5

What is the formula of hydroxide and sulfate

Answer 5

OH-
SO4^2-

Question 6

What is the formula of carbonate and nitrate

Answer 6

CO3^2-
NO3^-

Question 7

What is the formula for hydrogen carbonate and phosphate

Answer 7

HCO3^-
PO4^3-

Question 8

What is the formula for sulphuric acid and hydrochloric acid

Answer 8

H^2 SO^4
HCL

Question 9

What is the formula for nitric acid and ammonia

Answer 9

HNO3
NH3

Question 10

What is the formula for methane and water

Answer 10

CH4
H2O

Question 11

When should brackets be used in a formula

Answer 11

Brackets should be used when an ion with more than 1 atom are needed more than once