formula.expert
SCH4U · Ontario — energy, rates, equilibrium, acids, cells and solutions

Grade 12 Chemistry

0 of 215 stars · 0 of 43 lessons done · report card →
Formula pick
—
Rearranging
—
Setup & units
—
Answers
—

Thermochemistry

  • L1
    Counting particles
    grams → moles → molecules, before any heat arrives
    ★★★★★
    Start
  • L2
    Heat in the cup
    Q = mcΔT · and ΔT is a difference, not a reading
    ★★★★★
    Start
  • L3
    Warming and melting
    the heating curve · slopes take mcΔT, plateaus take mL
    ★★★★★
    Start
  • L4
    Heat per mole
    q = nΔH · and why exothermic is negative
    ★★★★★
    Start
  • L5
    The coffee cup
    two formulas in one chain · heat from the water, moles from the solution
    ★★★★★
    Start
  • L6
    The ladder of Hess
    route a reaction through steps you already know
    ★★★★★
    Start
  • L7
    The formation shortcut
    ΔH°f tables · products minus reactants, in that order
    ★★★★★
    Start
  • ★
    The Heat Audit
    the boss · no calculator · mass to moles to a verdict
    ★★★★★
    Start

Rates & Kinetics

  • L9
    Reading the rate law
    the order is an exponent you MEASURE
    ★★★★★
    Start
  • L10
    Arrhenius and the hill
    k = A·e^(−Ea/RT) · kelvin only, joules only
    ★★★★★
    Start
  • L11
    Two temperatures
    Ea from a pair of runs — or from the plot's slope
    ★★★★★
    Start
  • L12
    Straight-line decay
    zero order falls in a line, first order in a curve
    ★★★★★
    Start
  • L13
    The half-life clock
    t½ = ln2 / k · then count the halvings
    ★★★★★
    Start
  • L14
    Second-order slowdown
    1/[A] climbs · and every half-life is longer than the last
    ★★★★★
    Start
  • ★
    The Rate Tribunal
    the boss · no calculator · read it, warm it, run the clock
    ★★★★★
    Start

Chemical Equilibrium

  • L16
    Writing K
    products over reactants — and who never shows up
    ★★★★★
    Start
  • L17
    Q against K
    the same expression, measured too early — and what it predicts
    ★★★★★
    Start
  • L18
    Kp meets Kc
    (RT)^Δn · the crossing from concentrations to pressures
    ★★★★★
    Start
  • L19
    Sparingly soluble
    Ksp · s² against 4s³ · and why the smaller Ksp can win
    ★★★★★
    Start
  • L20
    Gibbs decides
    ΔG = ΔH − TΔS, and the bridge ΔG° = −RT ln K
    ★★★★★
    Start
  • ★
    The Position of Equilibrium
    the boss · no calculator · one converter, every tool in the chapter
    ★★★★★
    Start

Acids & Bases

  • L22
    The pH scale
    p is an operator · pH, pOH, and the ruler they share
    ★★★★★
    Start
  • L23
    The Kw family
    Ka, Kb, Kw · and the p-scale that flattens them
    ★★★★★
    Start
  • L24
    Weak acids and ICE
    pH from Ka and C · and how much actually let go
    ★★★★★
    Start
  • L25
    Buffer country
    Henderson–Hasselbalch · the pair's ratio sets the pH
    ★★★★★
    Start
  • L26
    Dilution discipline
    C = n/V and C₁V₁ = C₂V₂ · final volume, never added volume
    ★★★★★
    Start
  • L27
    The burette
    titration · the mole ratio referees · mL cancels, until it doesn't
    ★★★★★
    Start
  • ★
    The Titration Final
    the boss · no calculator · dilute it, titrate it, then rule on it
    ★★★★★
    Start

Electrochemistry

  • L29
    Reading the table
    which half-cell is the cathode, and what the cell is worth
    ★★★★★
    Start
  • L30
    Nernst, off standard
    what the cell is worth once the bath drifts
    ★★★★★
    Start
  • L31
    Charge on the clock
    Q = I·t · and the seconds the formula insists on
    ★★★★★
    Start
  • L32
    Faraday's scales
    m = QM/nF · coulombs weighed as grams
    ★★★★★
    Start
  • L33
    Time to plate
    the full ladder · mass, current or clock in turn
    ★★★★★
    Start
  • ★
    The Electroplating Shift
    the boss · no calculator · size the cell, run the current, weigh the rack
    ★★★★★
    Start

Gases & Solutions

  • L35
    The three gas laws
    one knob at a time · Boyle, Charles, Gay-Lussac
    ★★★★★
    Start
  • L36
    Combined and ideal
    several knobs at once · PV = nRT · 22.4 L/mol
    ★★★★★
    Start
  • L37
    Molar mass from the gas
    ρ = PM/RT · weigh a litre, name the gas
    ★★★★★
    Start
  • L38
    Partial pressures
    Dalton's law · a share of the moles is a share of the pressure
    ★★★★★
    Start
  • L39
    Graham's race
    lighter is faster — but only by a square root
    ★★★★★
    Start
  • L40
    Three ways to say how much
    molarity · molality · mass percent
    ★★★★★
    Start
  • L41
    Colligative counting
    ΔTb, ΔTf and Π · the solute's identity never matters
    ★★★★★
    Start
  • L42
    Vapour pressure stories
    Raoult · Henry · Clausius–Clapeyron
    ★★★★★
    Start
  • ★
    The Gas Works
    the boss · no calculator · compress it, mix it, weigh it
    ★★★★★
    Start

Nothing here is locked — the path recommends an order, and you study what you need. Progress lives in this browser (it survives cache clears, not “clear site data”); sign-in with permanent tracking is coming.