Gases can be compressed

Physically gases have a number of similarities. For example -  all gases will: fill the container in which they are placed and adopt its sha...

Fireworks get their colours from the metal cations in them

 2.45 - 2.46 Up in flames Fireworks produce a whole range of different colours. All fireworks release energy in the form of heat energy and are t...

Flame colours can help to identify the metal ion in a compound

Flame tests can be used to identify some metal ions (cations).Lithium, sodium, potassium, calcium and copper compounds producedistinctive colours in fl...

Water is an odourless, colourless liquid. So are many other chemicals .

Introduction Water has no obvious smell.  Water has no taste and water is colourless. Water has a neutral pH value ( pH 7). Many other chemi...

​Intro image Enter your text here ... Enter your text here ... ​To test for carbon dioxide. the test is to force the sample that you believe may be ca...

Oxygen is a  very reactive gas. It makes up approximately 20%  of our atmosphere.   ​The standard test for oxygen is to place a glowing...

Introduction ​Hydrogen is a flammable gas. It burns in air to produce water. A convenient test for hydrogen is to put a lighted splint in the mouth of...