# All articles by Nuffield Foundation – Page 10

• Experiment

### Rates and rhubarb

In this experiment, rhubarb sticks, which contain oxalic acid, are used to reduce and decolourise potassium manganate(VII) solution. The experiment can be used to show how the rate of reaction is affected by surface area or concentration.

• Experiment

### Iodine clock reaction demonstration method

Use this iodine clock reaction demonstration to introduce your students to rates of reaction and kinetics. Includes kit list and safety instructions.

• Experiment

### Spontaneous exothermic reaction

In this demonstration experiment, a mixture of glycerol (propane-1,2,3-triol) and potassium manganate(VII) crystals bursts into flame, giving off clouds of steam, after a short time lag.

• Experiment

### Exothermic or endothermic?

In this class experiment students measure the temperature changes in four reactions, and classify the reactions as exothermic or endothermic.

• Experiment

### Identifying the products of electrolysis

This experiment enables students to carry out the electrolysis of various solutions and to investigate the identity of the products formed at the electrodes. They should be able to link their practical experiences with theory and learn how to construct simple ionic equations.

• Experiment

### The ‘blue bottle’ experiment

In this demonstration, the redox indicator Methylene blue can be oxidised many times by shaking. Includes kit list and safety instructions.

• Experiment

### The thermite reaction between aluminium and iron(III) oxide

Illustrate a highly exothermic thermite reaction resulting in molten iron in this teacher demonstration. Includes kit list and safety instructions.

• Experiment

### Displacement reactions between metals and their salts

Students will investigate competition reactions of metals and determine a reactivity series of the four metals used. Includes kit list and safety instructions.

• Experiment

### A thermometric titration

The aim of this experiment is to measure the maximum temperature reached during the reaction between hydrochloric acid and sodium hydroxide solution. The volumes that have reacted at the highest temperature, represent the ‘end point’ of the titration.

• Experiment

### A microscale acid-base titration

In this experiment you will be using microscale titration apparatus to complete an acid-base neutralisation. The aim is to calculate the exact concentration of sodium hydroxide solution.

• Experiment

### The alcohol gun

Illustrate the large energy changes that take place during the combustion of alcohols with this spectacular demonstration.

• Experiment

### Red, white and blue!

Turn a solution of ammonia red, white or blue by adding phenolphthalein, lead nitrate or copper(II) sulfate solution.

• Experiment

### Neutralisation - 'curing acidity'

This simple experiment allows students to follow the pH and temperature changes when an acidic solution is gradually neutralised.

• Experiment

### Comparing light and heavy-duty detergents

Light-duty detegents are weakly alkaline, while heavy-duty detergents are moderately alkaline. The differing effects these have is investigated using standard washing conditions.

• Experiment

### Acid in the air

In this experiment, the corrosion of metals is tested under different atmospheric conditons: dry air, moist air and air polluted by sulfur dioxide.

• Experiment

### Electrolysis of molten lead(II) bromide

Introduce your students to the study of electrolysis through the production of metallic lead and bromine in this demonstration. Includes kit list and safety instructions.

• Experiment

### Making rayon

Create your own rayon fibres using cellulose in the form of cotton wool or filter paper.

• Experiment

### Phenol-methanal polymerisiation

Create and investigate the properties of Bakelite (the first genuine synthetic polymer) by dissolving phenol in a mixture of aqueous methanal and ethanoic acid to make the polymer.

• Experiment

### Distribution of iodine between two immiscible solvents

Using iodine crystals dissolved in equal volumes of two immiscible solvents, students can create an equilibrium distribution.

• Experiment

### Disappearing plastic

Solve the mysterious disappearance of expanded polystyrene that was placed in propanone – and investigate the clue of the ‘fizzing’ gas bubbles.