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Broad Topics > Applications > Chemistry

### A Question of Scale

##### Age 14 to 16 Challenge Level:

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

### Mixing Ph

##### Age 16 to 18 Challenge Level:

Use the logarithm to work out these pH values

### Blood Buffers

##### Age 16 to 18 Challenge Level:

Investigate the mathematics behind blood buffers and derive the form of a titration curve.

### Real-life Equations

##### Age 16 to 18 Challenge Level:

Here are several equations from real life. Can you work out which measurements are possible from each equation?

### Stats Statements

##### Age 16 to 18 Challenge Level:

Are these statistical statements sometimes, always or never true? Or it is impossible to say?

### Big and Small Numbers in Chemistry

##### Age 14 to 16 Challenge Level:

Get some practice using big and small numbers in chemistry.

### Bent Out of Shape

##### Age 14 to 18 Challenge Level:

An introduction to bond angle geometry.

### The Amazing Properties of Water

##### Age 14 to 18 Challenge Level:

Find out why water is one of the most amazing compounds in the universe and why it is essential for life. - UNDER DEVELOPMENT

### Stemnrich - Applied Mathematics

##### Age 11 to 16 Challenge Level:

This is the area of the stemNRICH site devoted to the core applied mathematics underlying the sciences.

### Maths in the Undergraduate Physical Sciences

##### Age 16 to 18

An article about the kind of maths a first year undergraduate in physics, engineering and other physical sciences courses might encounter. The aim is to highlight the link between particular maths. . . .

##### Age 16 to 18

Read about the mathematics behind the measuring devices used in quantitative chemistry

### Stereoisomers

##### Age 16 to 18 Challenge Level:

Put your visualisation skills to the test by seeing which of these molecules can be rotated onto each other.

### Clear as Crystal

##### Age 16 to 18 Challenge Level:

Unearth the beautiful mathematics of symmetry whilst investigating the properties of crystal lattices

### Reaction Rates!

##### Age 16 to 18

Fancy learning a bit more about rates of reaction, but don't know where to look? Come inside and find out more...

### The Power of Dimensional Analysis

##### Age 14 to 18

An introduction to a useful tool to check the validity of an equation.

### What Salt?

##### Age 16 to 18 Challenge Level:

Can you deduce why common salt isn't NaCl_2?

### Diamonds Aren't Forever

##### Age 16 to 18 Challenge Level:

Ever wondered what it would be like to vaporise a diamond? Find out inside...

### Smoke and Daggers

##### Age 16 to 18 Challenge Level:

We all know that smoking poses a long term health risk and has the potential to cause cancer. But what actually happens when you light up a cigarette, place it to your mouth, take a tidal breath. . . .

### CSI: Chemical Scene Investigation

##### Age 16 to 18 Challenge Level:

There has been a murder on the Stevenson estate. Use your analytical chemistry skills to assess the crime scene and identify the cause of death...

### Spectrometry Detective

##### Age 16 to 18 Challenge Level:

From the atomic masses recorded in a mass spectrometry analysis can you deduce the possible form of these compounds?

### Gassy Information

##### Age 16 to 18 Challenge Level:

Do each of these scenarios allow you fully to deduce the required facts about the reactants?

### Eudiometry

##### Age 16 to 18 Challenge Level:

When a mixture of gases burn, will the volume change?

### Ideal Axes

##### Age 16 to 18 Challenge Level:

Explore how can changing the axes for a plot of an equation can lead to different shaped graphs emerging

### Coordinated Crystals

##### Age 16 to 18 Challenge Level:

Explore the lattice and vector structure of this crystal.

### Reductant Ratios

##### Age 16 to 18 Challenge Level:

What does the empirical formula of this mixture of iron oxides tell you about its consituents?

### The Real Hydrogen Atom

##### Age 16 to 18 Challenge Level:

Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms

### Molecular Sequencer

##### Age 14 to 18 Challenge Level:

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.

### Heavy Hydrocarbons

##### Age 14 to 18 Challenge Level:

Explore the distribution of molecular masses for various hydrocarbons

### Cobalt Decay

##### Age 16 to 18 Challenge Level:

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

### Striking Gold

##### Age 16 to 18 Challenge Level:

Investigate some of the issues raised by Geiger and Marsden's famous scattering experiment in which they fired alpha particles at a sheet of gold.

### Constantly Changing

##### Age 14 to 16 Challenge Level:

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

### Lennard Jones Potential

##### Age 16 to 18 Challenge Level:

Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges

### Approximately Certain

##### Age 14 to 18 Challenge Level:

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

### Big and Small Numbers in Physics

##### Age 14 to 16 Challenge Level:

Work out the numerical values for these physical quantities.

### Chemnrich

##### Age 14 to 18 Challenge Level:

chemNRICH is the area of the stemNRICH site devoted to the mathematics underlying the study of chemistry, designed to help develop the mathematics required to get the most from your study. . . .

### Core Scientific Mathematics

##### Age 14 to 18 Challenge Level:

This is the area of the advanced stemNRICH site devoted to the core applied mathematics underlying the sciences.

### Reaction Types

##### Age 16 to 18 Challenge Level:

Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.

### Bond Angles

##### Age 16 to 18 Challenge Level:

Think about the bond angles occurring in a simple tetrahedral molecule and ammonia.

### Concentrations

##### Age 16 to 18 Challenge Level:

Use the interactivity to practise your skills with concentrations and molarity.

### Extreme Dissociation

##### Age 16 to 18 Challenge Level:

In this question we push the pH formula to its theoretical limits.

### Ph Temperature

##### Age 16 to 18 Challenge Level:

At what temperature is the pH of water exactly 7?

### Exact Dilutions

##### Age 14 to 16 Challenge Level:

Which exact dilution ratios can you make using only 2 dilutions?

### Investigating the Dilution Series

##### Age 14 to 16 Challenge Level:

Which dilutions can you make using only 10ml pipettes?

### Dilution Series Calculator

##### Age 14 to 16 Challenge Level:

Which dilutions can you make using 10ml pipettes and 100ml measuring cylinders?

### Conversion Sorter

##### Age 14 to 16 Challenge Level:

Can you break down this conversion process into logical steps?

### Catalyse That!

##### Age 16 to 18 Challenge Level:

Can you work out how to produce the right amount of chemical in a temperature-dependent reaction?

### Mixed up Mixture

##### Age 14 to 16 Challenge Level:

Can you fill in the mixed up numbers in this dilution calculation?

### Reaction Rates

##### Age 16 to 18 Challenge Level:

Explore the possibilities for reaction rates versus concentrations with this non-linear differential equation

### Mathematical Issues for Chemists

##### Age 16 to 18

A brief outline of the mathematical issues faced by chemistry students.