Dot equations

How do you work out dot from empirical?

Divide number of hydrogen atoms by 2

Describe the determination of formula for a hydrated salt

1. Calculate amount in moles of anhydrous salt

2. Calculate amount in moles of water

3. Simplify ratio by dividing smallest number

Define empirical formula

Gives smallest whole number ratio of atoms of each element in a compound

Define molecular formula

Gives actual numbers of atoms of each type of element in a molecule

How do you calculate empirical formulae? & For percentages

Calculate moles of each component involved in reaction then divide by smallest number to get simplest ratio

Replace percentages with mass

Describe anhydrous salts practical