Chemistry - determination of formulae

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6 Terms

1
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empirical formula

simplest whole number ratio of atoms or ions of each element present in the compound

2
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molecular formula

actual number and type of atoms of each element in a molecule

3
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molecular formula equation

n x empirical formula

4
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molecular formula mass equation

n x empirical formula mass

5
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hydrated salts

have water molecules incorporated into their crystal structure, the water molecules are known as water of crystallisatoin

6
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percentage water of crystallisation in hydrated compounds equation

(no. of water molecules x Mr of water)/Mr x 100