Empirical Formulae and Hydrated Salts
- Created by: Emily Cartwright
- Created on: 31-03-14 09:24
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- Empirical Formulae and Stoichiometry
- 'The Molecular Formula of a substance shows the number of atoms of each element in one moleucle of the substance'
- 'The empirical formula of a substance shows the simplest whole number ratio of atoms of each element present in a substance'
- Formulae of Hydrated Salts
- When you have some compounds dissolved in water and the water evaporates you are left with crystals
- The water may still be there but locked in ions around the crystals
- This water is called the water of crystallisation and is part of the solid structure of the compound
- The water may still be there but locked in ions around the crystals
- If a hydrated salt is heated, the water may be driven off as steam, leaving the salt behind but with no water of crystallisation. This is called an anhydrous salt
- A salt which includes some water of crystallisation is called a hydrated salt
- When you have some compounds dissolved in water and the water evaporates you are left with crystals
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