chemNRICH

stemNRICH : Science, Technology, Engineering, Mathematics enriched
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Welcome to chemNRICH: the chemistry section of stemNRICH Advanced. This contains mathematical activities designed to complement and enhance the study of chemistry, particularly for students aged 16-19.

 

Area of chemical maths	Style	Question	Description
Molecular masses	Image	Heavy Hydrocarbons	Explore the distribution of molecular masses for various hydrocarbons.
	Image	Molecular Sequencer	Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.
	Image	Spectrometry Detective	From the atomic masses recorded in a mass spectrometry analysis can you deduce the possible form of these compounds?
Dilutions	Image	Dilution Series Calculator	In this interactive tool a bacterial solution is diluted in four stages. Can you work out what the final concentration will be? Practise with new questions until you understand the process.
	Image	Investigating the Dilution Series	Follow on from the previous question by choosing the dilutions in each of four stages to try to match certain final targets.
	Image	Exact Dilutions	Save on the washing up! Using just three beakers can you create dilutions of certain concentrations?
Logarithms and pH	Image	pH Temperature	From a table of data for the dissociation constant of water at various temperatures, work out how hot water must be to have different pH values.
	Image	Mixing pH	Use the pH formula to calculate the pH and concentrations of dilutions.
	Image	Extreme Dissociation	Take the pH formula to its theoretical limits in these extreme calculations.
	Image	Blood Buffers	In this extended question explore how blood buffers keep the pH levels balanced in the human body.
Atoms and particles	See the Atoms and Particles problems on the physNRICH pages
Reaction kinetics	Image	Catalyse That	Explore rates of a temperature dependent reaction
	Image	Reaction Types	How can algebra be used to represent different reaction types? What does the equation tell us about the behaviour of the reaction?
Gases	See also the Gas Laws problems on the physNRICH pages
	Image	Eudiometry	Which reactions cause an increase in volume, and which a decrease?
	Image	Gassy Information	Does each of these scenarios allow you fully to deduce the required facts about the reactants?
	Image	Diamonds Aren't Forever	Investigate the ideal gas laws in the context of diamond gas.
Bonds, geometry and crystals	Image	Coordinated Crystals	Practise your visualisation skills regarding 3D crystal structures.
	Image	Bond Angles	Put your vectors to the test with this exploration of the geometry of tetrahedral molecules and ammonia.
	Image	Stereoisomers	Which of these molecules can be rotated on to each other, and which are stereoisomers?
Enthalpy	Image	Which Salt?	Work out why common salt is not NaCl2 by analysing the Born-Haber cycle.
Moles and molarity	Image	Reductant Ratios	What does the empirical formula of this mixture of iron oxides tell you about its constituents?
Advanced mathematics in chemistry	Image	CSI: Chemical Scene Investigation	Give your general quantitative chemistry and problem solving skills a workout in this entertaining extended investigation.
	Image	The Real Hydrogen Atom	Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms.
	Image	Clear as Crystal	Unearth the beautiful mathematics of symmetry whilst investigating the properties of crystal lattices.
Articles	Image	Inspect Your Gadgets	Look at the tools and mathematics which underly quantitative chemistry.
	Image	Reaction Rates!	Find out how rates of reactions and equations go together.