Calculating Empircal Formula:

Question 1

What is the empirical formula?

Answer 1

= simplest whole number ratio of the atoms of each element in a compound.

Question 2

How do we work out the empirical formula?

Answer 2

= from the molecular formula
= dividing all the numbers by the smallest

Question 3

How do we calculate the empirical formula?

Answer 3

= calculate the number of moles
= divide the moles by the smallest number
= gives us the ratio
=

Question 4

How do we calculate the empirical formula when it is a percentage?

Answer 4

= find the moles
= divide by the smallest number of moles
=

Question 5

How do we produce a whole number ratio?

Answer 5

= times all the ratio by 2

Question 5

How do we calculate the molecular formula from the empirical formula?

Answer 5

= divide molecular formula mass of the compound by the relative molecular mass of the empirical formula
= tells us the multiplier
=