Online tutoring for Grade 11 and 12 Chemistry (SCH3U, SCH4U)

Who this is for

• Grade 11 students taking SCH3U, at school or online
• Grade 12 students in SCH4U who need equilibrium or electrochemistry to click
• Students heading for university science, health science or engineering programs that require SCH4U
• Parents who want a written note after each lesson on what was covered and what comes next

From SCH3U to SCH4U

Grade 12 Chemistry treats mole calculations, bonding and solution concentration as automatic. A student who was shaky on stoichiometry in grade 11 meets it again inside every equilibrium and enthalpy question.

So the first SCH4U lessons start with a few grade 11 calculations, and any gap is closed before the new units depend on it.

Where students get stuck in Chemistry

• Limiting reagents and mole conversions

  Converting grams to moles, using the mole ratio, and spotting which reactant runs out first are three steps, and a slip in any one of them carries through to the final answer.

• Concentration and dilution calculations

  Students mix up moles and mol/L, forget to convert millilitres to litres, or use the dilution formula where a stoichiometry step is needed. Units decide most of these marks.

• Naming organic compounds and predicting their reactions

  The naming rules are many and strict: the longest chain, numbering, functional group priority. Predicting the product of an addition or condensation reaction then depends on reading those names correctly.

• Lewis structures, VSEPR shape and molecular polarity

  A molecule's shape decides its polarity, and polarity decides its intermolecular forces. A wrong count of lone pairs at the start makes every later answer in the question wrong.

• Hess's law and enthalpy calculations

  Reversing an equation flips the sign of its enthalpy, and scaling it scales the enthalpy. Keeping track of both while combining three or four equations is where marks go.

• ICE tables, Le Chatelier's principle and Ksp

  Equilibrium questions ask students to set up a table, decide which approximations are allowed, and explain a shift in words. Each is a separate skill, and tests ask for all three.