Solubility of solute in solvent is frequently named by students as one of the more confusing MCAT topics. This webinar will teach solubility through the lens of both thermodynamics and equilibrium. We will cover solubility rules, factors that affect solubility like the common ion effect, how to calculate molar solubility from Ksp and how to answer questions about solubility and precipitate formation. 

At a glance


Essential skills

  • Classify salts in terms of solubility

  • Classify acidic, basic and neutral salts

  • Calculate molar solubility from Ksp

  • Read precipitation and solubility charts

  • Determine whether a precipitate will form based on molar solubility or Ksp

  • Differentiate Ksp and Q


Knowledge Fundamentals

  • Solubility rules

  • Factors that affect solubility

  • The common ion effect

  • Solubility in terms of thermodynamics, equilibrium and biological applications


On the MCAT

  • Though rooted in equilibrium, solubility has wide applications to many areas of chemistry and biology (kidney stones!). The test likes to make these connections.

  • Solubility can quickly become calculation heavy and time consuming. Have a strategy! Don’t make the common mistakes that we mention.


I think these webinars are really helpful! I like how they’re styled like a TED talk, so they don’t interfere with the day, but they’re really helpful review 🙂

I found everything helpful about these webinars: the explanations, the illustrations, just everything!

Amazing material conveyed concisely and in great detail!

The wealth of information and sample questions are great.

“These 30 minute FREE, live videos conducted each Friday helped me get through the pandemic. Weike is an exceptional tutor, and being able to ask questions after she’s done was magnificent. These webinars have even helped me in class subjects such as Biochemistry.  I’m looking forward to starting one-on-one tutoring with Cambridge Coaching, and I’m already feeling confident about taking the MCAT when the time comes.”

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