Measurement, Mass & Equations (AQA GCSE Chemistry): Flashcards
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12 cards from this deck
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Practise the cards
12 cards from this deck
What is a balanced equation?
What is a balanced equation?
Shows how reactant particles rearrange to make products
Atoms in chemical reactions
Atoms in chemical reactions
Not lost or made, just rearranged
Law of conservation of mass
Law of conservation of mass
Total mass stays same in all reactions
Reactant mass vs product mass
Reactant mass vs product mass
Mass of reactants = mass of products
Relative formula mass ()
Relative formula mass ()
Sum of atomic masses in a compound
Steps to calculate
Steps to calculate
- Look up atomic masses 2. Multiply by atom count 3. Add values
of HCl (H=1, Cl=35.5)
of HCl (H=1, Cl=35.5)
36.5
Using balanced equations to predict masses
Using balanced equations to predict masses
Use equation ratios to calculate product mass from reactants
Why mass appears to decrease
Why mass appears to decrease
A gas product escapes from the container
Example of gas that escapes
Example of gas that escapes
bubbles away in reactions
If all products are captured
If all products are captured
Total mass stays the same
What do equation ratios show?
What do equation ratios show?
How to calculate masses of reactants and products