Determination of Formulae (OCR A-Level Chemistry A): Flashcards
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Practise the cards
10 cards from this deck
What a molecular formula shows
What a molecular formula shows
Exact number of atoms of each element in one molecule
What an empirical formula represents
What an empirical formula represents
Simplest whole-number ratio of atoms of each element
Examples of diatomic elements
Examples of diatomic elements
, halogens
How to calculate relative molecular mass ()
How to calculate relative molecular mass ()
Add up all values in the molecular formula
What hydrated salts contain
What hydrated salts contain
Water of crystallisation as part of crystal structure
Meaning of anhydrous
Meaning of anhydrous
Water-free
Formula relating moles (), mass (), molar mass ()
Formula relating moles (), mass (), molar mass ()
What the dot (•) means in hydrated salt formulae
What the dot (•) means in hydrated salt formulae
Separates compound formula from water molecules
Why heat to constant mass in hydrated salt experiments
Why heat to constant mass in hydrated salt experiments
Ensures all water is removed
How to find molecular formula from empirical formula
How to find molecular formula from empirical formula
Divide given by empirical formula mass, then multiply