Percentage Composition and Empirical Formula-C5
- Created by: Shannon
- Created on: 24-04-13 18:04
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- Percentage Composition and Empirical Formula
- Empirical formula: the simplest whole number ratio of each type of atom in a compund
- Glucose- C6H12O6---> CH2O
- Empirical formula can be calculated in five stages
- 1) Write down the mass of each element
- 2) Find relative atomic mass
- 3) Work out how many moles there are of each element (=relative atomic mass)
- 4) Choose the element present in the smallest amount
- 5) Divide the moles by the smallest mole compound then DO THE RATIO
- 4) Choose the element present in the smallest amount
- 3) Work out how many moles there are of each element (=relative atomic mass)
- 2) Find relative atomic mass
- 1) Write down the mass of each element
- % mass of an element= total mass in compound/rel-ative formula mass
- % composition by mass
- 1) Mass of an element in 100g of acid
- 2) Relative atomic mass
- 3) Convert to moles of each element
- 4) Identify the element present in the smallest amount
- 5) Divide by the smallest
- 4) Identify the element present in the smallest amount
- 3) Convert to moles of each element
- 2) Relative atomic mass
- 1) Mass of an element in 100g of acid
- Empirical formula: the simplest whole number ratio of each type of atom in a compund
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