Unit flashcards
Unit 3: Stoichiometry — one card for every lesson
Unit 3 overview: Stoichiometry
Stoichiometry Tap to flipUnit 3 overview: Stoichiometry
Unit 3 overview — CO-ORDINATED SCIENCES: Stoichiometry — 2 topics and 6 lessons. Work through the lessons in order, then use each lesson's Key terms and Common mistakes tabs to revise.TopicLessons3.1 Formulae and Relative Masses3.1.1 Formulae3.1.2 Writing Equations3.1.3 Ar and…
Open the lessonFormulae
Stoichiometry Tap to flipFormulae
3.1.1 Formulae — CO-ORDINATED SCIENCES notes: State and deduce formulae, and write word, symbol and ionic equations with state symbols.Chemical symbolChemical symbol an element is represented by the symbol from the Periodic Table, such as Li, Cr, Al, Ca, Au…
Open the lessonWriting Equations
Stoichiometry Tap to flipWriting Equations
3.1.2 Writing Equations — CO-ORDINATED SCIENCES notes: Write word equations and balanced symbol equations with state symbols for chemical reactions, starting from the information given in a question.Reactants and productsReactants and products A word equation names every substance in a…
Open the lessonAr and Mr
Stoichiometry Tap to flipAr and Mr
3.1.3 Ar and Mr — CO-ORDINATED SCIENCES notes: Define relative atomic mass and relative molecular or formula mass, calculate Mr from a formula, and use them in simple reacting-mass calculations.Why a relative scaleWhy a relative scale Atoms are far too…
Open the lessonThe Mole
Stoichiometry Tap to flipThe Mole
3.2.1 The Mole — CO-ORDINATED SCIENCES notes: Define the mole and the Avogadro constant and use moles = mass ÷ Mr to convert between mass, amount and number of particles.Counting unitCounting unit A mole is the amount of substance that…
Open the lessonLinking Moles, Mass and Mr
Stoichiometry Tap to flipLinking Moles, Mass and Mr
3.2.2 Linking Moles, Mass and Mr — CO-ORDINATED SCIENCES notes: Use the mole, the Avogadro constant and the relationship moles = mass ÷ Mr to convert between mass, amount and number of particles (HT only).The moleThe mole The mole (symbol…
Open the lessonReacting Masses
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3.2.3 Reacting Masses — CO-ORDINATED SCIENCES notes: Use balanced equations and relative formula masses to calculate the mass of a product or reactant, and to find percentage composition.Equations give ratiosEquations give ratios The numbers in front of formulae in a…
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