All Acids and bases articles – Page 8
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ResourceMaking your own indicator
In Search of Solutions: Use dyes to create a reliable indicator. Linking to topics on acids/alkalis and indicators.
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Lift Oxo cubes to dizzy heights
In Search of Solutions: Design and build a machine to lift Oxo cubes, who can lift the highest? Linking to topics on production of carbon dioxide gas.
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Indicator puzzle
In Search of Solutions: Extract colours from plants and use them as chemical indicators. Linking to topics on buffers, acids/alkalis and indicators.
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Funny felt pens
In Search of Solutions: Use chemical wizardry to change the colour of felt pens! Linking to topics on chromatography, acids/alkalis, indicators, dyes and polar/nonpolar solvents.
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Colour creation
In Search of Solutions: Use acid/base titration and indicator solution to produce colourful solutions. Linking to topics on acids/alkalis and indicators.
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Building a chemically powered boat
In Search of Solutions: Build the best vessel to pit against peers in a gas powered boat race. Linking to topics on acids/bases and their chemical reactions.
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Feature
Textile conservation
Anita Quye explains how to look after fragile fabrics for future generations
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Paper conservation
History is written on paper and chemistry is at the heart of paper conservation
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The Mole
Using chemistry to turn ‘water’ into ‘wine’
Learn how iron(III) oxide and potassium thiocyanate can be used to turn ‘water’ into ‘wine’, and try a similar experiment yourself using household ingredients.
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On This Day - Feb 22 : Johannes Brønsted was born
Brønsted developed an identical definition of acids and bases simultaneously but independently from English chemist Thomas Lowry in 1923. Acids are recognised by an excess of H+ ions, and bases have an excess of OH- ions.
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On This Day - Nov 17 : Nicolas Lemery was born
His research focus was in the area of acid-base chemistry, but he also prepared a comprehensive dictionary of pharmaceuticals and wrote a chemistry textbook Cours de chymie (1675) that had 31 editions by 1756!
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On This Day - Jan 09 : Søren Sørensen was born
He developed the pH scale (which ranges from 0-14) at the Carlsberg Laboratory in Denmark. This was the first time that the negative logarithm of proton (H+) concentration was used as a measure of acidity.
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Feature
Microscale chemistry revisited
Microscale techniques are unlikely to replace our traditional approach to chemistry education, but they do provide an extra dimension to our teaching strategies
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28 chemistry puzzles for 14-16 years
Use these sudoku-inspired puzzles with printable worksheets and answers to help 14–16 year olds consolidate their understanding of key chemical concepts.
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45 chemistry puzzles for 16-18 years
Try these chemistry puzzles based on sudoku to help 16–18 year old students consolidate their knowledge about key topics, with printable worksheets and answers.
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28 chemistry puzzles for 11-14 years
Try these sudoku-style chemistry puzzles for 11–14 year olds to reinforce your students’ understanding of key ideas, featuring printable worksheets and answers.
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Exhibition chemistry
Dissolving copper in nitric acid
The dramatic reaction between copper and nitric acid ought to be seen
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Feature
The discovery of fluorine
The hazardous nature of hydrogen fluoride brought agony and death to investigators during early attempts to isolate fluorine
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