Area of chemical maths |
Style |
Question |
Description |
Molecular masses |
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Explore the distribution of molecular masses for various hydrocarbons. |
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Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer. |
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From the atomic masses recorded in a mass spectrometry analysis can you deduce the possible form of these compounds? |
Dilutions |
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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. |
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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. |
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Exact Dilutions |
Save on the washing up! Using just three beakers can you create dilutions of certain concentrations? |
Logarithms and pH |
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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. |
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Mixing pH |
Use the pH formula to calculate the pH and concentrations of dilutions. |
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Extreme Dissociation |
Take the pH formula to its theoretical limits in these extreme calculations. |
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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 |
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Catalyse That |
Explore rates of a temperature dependent reaction |
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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 |
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Which reactions cause an increase in volume, and which a decrease? |
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Does each of these scenarios allow you fully to deduce the required facts about the reactants? |
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Diamonds Aren't Forever |
Investigate the ideal gas laws in the context of diamond gas. |
Bonds, geometry and crystals |
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Coordinated Crystals |
Practise your visualisation skills regarding 3D crystal structures. |
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Bond Angles |
Put your vectors to the test with this exploration of the geometry of tetrahedral molecules and ammonia. |
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Stereoisomers |
Which of these molecules can be rotated on to each other, and which are stereoisomers? |
Enthalpy |
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Which Salt? |
Work out why common salt is not NaCl2 by analysing the Born-Haber cycle. |
Moles and molarity |
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What does the empirical formula of this mixture of iron oxides tell you about its constituents? |
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Smoke and Daggers |
Give your general chemistry and knowledge of moles and concentrations a workout with this entertaining extended problem concerning the dangers of smoking. |
Advanced mathematics in chemistry |
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CSI: Chemical Scene Investigation |
Give your general quantitative chemistry and problem solving skills a workout in this entertaining extended investigation. |
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The Real Hydrogen Atom |
Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms. |
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Clear as Crystal |
Unearth the beautiful mathematics of symmetry whilst investigating the properties of crystal lattices. |
Articles |
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Inspect Your Gadgets |
Look at the tools and mathematics which underly quantitative chemistry. |
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Reaction Rates! |
Find out how rates of reactions and equations go together. |