Categories
Christmas Chemistry

Christmas Cracker Chemistry

Chances are you’ll be making use of christmas crackers over the holiday period. Chances also are that you’ve never really given a lot of thought to the chemical compounds contained therein, or the chemical reaction that makes christmas crackers go bang. Well, allow me to elaborate. Christmas crackers owe their crack to a compound called […]

Categories
General Chemistry

Element Infographics – Group 2

The second of a series of infographics on the groups of the periodic table, here some general properties of the group 2 elements are examined. As stated previously, these are primarily aimed at secondary school students, hence the relative simplicity and generality of the information presented. If you want to download this infographic for your […]

Categories
Colourful Chemistry

‘Poisonous’ Poinsettia pH Indicators

I’m making pH indicator paper with some of my classes this week, using the coloured leaves of red poinsettia plants, which set me thinking about the chemistry behind why these plants can be used as indicators. Poinsettias have a reputation for being poisonous – a claim that is in fact entirely unfounded. A quick google […]

Categories
General Chemistry

Element Infographics – Group 1

This is one of the infographics I’ve been making as part of a classroom display. I wanted to display all the key points about each group of elements, in a way that was both clear and engaging for the pupils – as a consequence, the information presented is relatively basic, so that it’s accessible for […]

Categories
Inorganic Chemistry

Removing Tarnish from Silver

Silver tarnishes in air to form a black coating of silver sulphide, which has the formula Ag2S. The chemical equation for the formation of silver tarnish following reaction with hydrogen sulphide (H2S) is as follows: 2 Ag(s) + H2S(g) → Ag2S(s) + H2(g) There’s speculation that, in the present day, tarnishing of silver actually occurs more quickly due […]