CPQ#3 – Acid-base & Equilibrium

Here are 10 practice questions on Chemical Bonding covering the following topics Lewis acid-base Bronsted-Lowry acid-base pH calculations pOH calculations Ka expression titration equivalence point titration-pKb buffer region buffer examples Henderson-Hasselbalch equation Can you solve the 10 questions in 10 minutes or less? Try them out on your own before checking the answers. 😉 How …

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CPQ#1 – Equations and Stoichiometry

Here are 10 practice questions on Equations and Stoichiometry covering the following topics balancing chemical equation type of chemical reaction writing net ionic equation balancing redox equation molar mass mass composition empirical formula molecular formula limiting reactants (mol A-molB) limiting reactants (mass A-mass B) Can you solve the 10 questions in 10 minutes or less? …

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SI Prefixes mnemonic

SI Prefixes

Need to convert between prefixes like from picosecond to microsecond? Or kilometer to milimeter? Do you need to memorize the SI prefixes? Find it difficult to remember the letters/symbols, sequence and exponent value? If you answered yes, then you are not alone. My students join you in this struggle. That’s why I developed a mnemonic to help …

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Flow chart for classification of matter

Classification of Matter

Pure substance and mixture. Element and compound. Homogeneous mixture and heterogeneous mixture. How are they different? Does it MATTER? Yes! WHY? How to classify them? You’re in luck! Ask two questions and you can easily classify matter into element, compound, homogeneous mixture and heterogeneous mixture. Let me show you how. Let’s classify one of the …

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