Where Do Redox Reactions Happen in Daily Life? Examples We Use in Class
Explore examples of redox reactions in everyday life we use at Mr Khemistry to explain oxidation, reduction, electron transfer and O-Level exam concepts.
Posts by mradm1n
How We Explain Electrochemistry Principles to Our O- and A-Level Students
Learn how Mr Khemistry explains electrochemistry principles at O- and A-Level, from electrolysis and redox to E° values and Faraday calculations.
Struggling With Solubility Rules? Here’s How We Make the Exceptions Easier to Remember
Struggling with solubility rules and their exceptions? Learn practical ways to remember common patterns, predict precipitates, and tackle exam questions.
Why Do Transition Elements Have Variable Oxidation States?
Transition metals like Fe and Mn show many oxidation states because 3d and 4s are close in energy, so successive ionisation energies rise only gradually.
How Chemistry Makes You Think Differently: What We See in Our Students
Discover how students build critical thinking in Chemistry by applying concepts, spotting patterns, learning from mistakes, and solving unfamiliar questions.
How to Make Chemistry Notes That Actually Help You Revise
Discover how to make effective Chemistry notes that help simplify revision, highlight key patterns, and allow you to apply concepts more confidently in exams.
Does Limestone Dissolve in Water?
Limestone (CaCO₃) is almost insoluble in pure water, but dissolved CO₂ turns it into soluble calcium hydrogencarbonate. The chemistry and the A-level link.
SnCl₂ Shape and Bond Angle, Explained with VSEPR
SnCl₂ is bent, not linear, because tin keeps a lone pair. The VSEPR count, the bond angle just under 120°, and why it differs from BeCl₂.
Why Does Carbon Monoxide (CO) Have a Triple Bond?
C has 4 electrons, O has 6, yet CO has a triple bond. The dot-and-cross, the dative bond from oxygen, and the formal charges, explained.
Is HCO₃⁻ an Acid or a Base?
HCO₃⁻ (hydrogencarbonate) can act as an acid or a base. Clear worked examples of both, plus a 2022 A-level question on the blood buffer.