Chemistry Tutoring

• The mole. Nearly every downstream difficulty in the first semester traces back to whether unit conversion through the mole is automatic or effortful.
• Stoichiometry with a limiting reactant, where the arithmetic is easy and knowing which quantity governs is not.
• Equilibrium and Le Châtelier, taught as a rule to recite rather than a system that responds.
• Acid–base and buffer problems, where students memorize four scenarios instead of one framework.
• Thermochemistry sign conventions — endothermic, exothermic, system, surroundings — which are pure bookkeeping and cost enormous numbers of points.
• Gas laws applied without checking whether the assumptions hold.

Units carry the reasoning. Dimensional analysis is not a formatting requirement — it is the method. If the units resolve, the setup is usually right, and this single habit fixes more chemistry than any other.

Draw the particles. Concentration, equilibrium, and gas behaviour all become concrete when you sketch what is in the container. Students who picture it stop guessing.

One framework, not many special cases. Acid–base problems are the clearest example: a weak acid, a buffer, and a titration midpoint are the same equilibrium under different conditions, and teaching them as one thing is far more durable than teaching four.

Balance and check before calculating. An unbalanced equation makes every subsequent number wrong, and it is a ten-second check.

Estimate first. Knowing an answer should be "a bit less than 1 mole" catches calculator and conversion errors immediately.