Grade 12 · University
SCH4U Grade 12 Chemistry, worked through with a live AI tutor
SCH4U opens with organic chemistry, which is unusual, and the naming and reaction rules of that unit are what students remember most. The equilibrium and acid-base unit is where the marks go: ICE tables, the approximation and when it is allowed, buffers, and titration curves. The tutor can draw a mechanism, set up an ICE table, or balance a half-reaction with you from your own problem set.
Prerequisite: SCH3U (Grade 11 Chemistry, university preparation)
What SCH4U covers
The strands of SCH4U Chemistry, in our words rather than the Ministry’s. Your teacher’s course outline decides the order and the weight.
Organic chemistry
Naming and drawing hydrocarbons and the main functional groups, isomers, the typical reactions of each family, and polymers.
Structure and properties of matter
Quantum numbers and electron configuration, the shapes of molecules, intermolecular forces, and how structure explains a substance's physical properties.
Energy changes and rates of reaction
Enthalpy, calorimetry, Hess's law, bond energies, reaction rates, collision theory, rate laws and catalysts.
Chemical systems and equilibrium
Dynamic equilibrium and Le Chatelier's principle, the equilibrium constant and ICE tables, solubility equilibria, acids and bases, pH, buffers and titrations.
Electrochemistry
Oxidation numbers, balancing redox reactions by half-reactions, galvanic and electrolytic cells, standard reduction potentials, and corrosion.
Curriculum reference: Ontario Ministry course page, checked .
Where students get stuck
ICE tables and when to drop the x
Set the initial row, write the change row as the coefficients times x with the sign from the direction the reaction moves, and add. The approximation of ignoring x in the denominator is allowed only when the initial concentration divided by the constant is large; a common rule is greater than about five hundred. If it fails, solve the quadratic, and SCH4U tests that case on purpose.
Hess's law: flipping and scaling
Line up the target equation, then flip any given equation whose reactant is on the wrong side and change the sign of its enthalpy. Scale each equation so the substances that must cancel do, and multiply the enthalpy by the same factor. Add. The bookkeeping is the whole method; the chemistry is that enthalpy is a state function.
Balancing a redox reaction in acidic solution
Split into two half-reactions, balance every element except hydrogen and oxygen, then oxygen with water, then hydrogen with hydrogen ions, then charge with electrons. Multiply so the electrons match and add. In basic solution do the same, then neutralise the hydrogen ions with hydroxide on both sides. Skipping the charge step is where most answers go wrong.
Naming an organic compound with more than one functional group
Find the longest chain that contains the highest-priority group, number from the end that gives that group the lowest number, then list the other substituents alphabetically with their positions. The priority order is what decides the suffix; everything else is a prefix. Draw the structure before you name it, not after.
How a session on SCH4U works
- 1
Bring the actual problem
Share your screen, upload the page, or hold it up to the camera. The tutor reads the SCH4U question itself instead of your retyped version of it.
- 2
Talk it through on the whiteboard
You explain where you got to, out loud. The tutor writes the next step on a shared board while it talks, and asks you to take the one after that.
- 3
Try the next one yourself
Generate a practice set on the same topic, with full worked solutions that show the method rather than only the answer.
It starts in Learn mode: concepts first, the answer as a last resort. The tutor is not a Ministry resource and does not replace your teacher’s course outline.
SCH4U questions
Does the tutor follow the Ontario SCH4U curriculum?
It works from your textbook, your notes and your assignment, and from the five SCH4U strands: organic chemistry, structure and properties of matter, energy changes and rates, chemical systems and equilibrium, and electrochemistry. It is not an official Ministry resource.
Can the tutor draw organic structures and mechanisms?
Yes, on the shared whiteboard. A condensed structure, a reaction scheme or the arrows of an addition reaction can be drawn and talked through rather than described in words.
Stuck on SCH4U tonight
Bring the question from your own textbook or assignment. Talk it through out loud and watch it worked out step by step on a whiteboard.
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