Covalent bonds form when electrons are shared between nuclei Atoms which can form two or more covalent bonds can bond with other similar ato...
Look at the images of ice and diamond. In some senses you might say the two substances are similar. Both substances are solid,&n...
​Intro image ​Why there might still be hope.. Enter your text here ... Enter your text here ... Enter your text here ... Enter your text here ... Ente...
Intro image OCROCR 2EdexcelAQA Enter your text here ... Enter your text here ... I had a dream! This presentation outlines the way i...
Finding the formula of a compound is important to chemists. We can often predict what the formula might be because we know something about the el...
In this section we consider how much product is formed by a chemical reaction . Some reaction processes are not very efficien...
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Students should: 1.10 describe these experimental techniques for the separation of mixtures: simple distillation fractional distillation filtrat...
1.28 Calculating moles The following masses of elements all contain one mole of atoms: 12.0 g Carbon, 32.1 g Sulphur, 14 g Nitrogen,&n...
1.27 What is a mole? Students should: 1.27 know that the mole (mol) is the unit for the amount of a substance 1.28 understand how to carry...
1.26 "Counting" by measuring mass Sometimes chemists need to "count" out a specific number of atoms, ions or molecules of a substance....
Relative masses allow chemists to "count out" atoms and molecules so they can ensure that the appropriate amounts of substances are reacted.
Relative masses allow chemists to "count out" atoms and molecules so they can ensure that the appropriate amounts of substances are reacted.
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​To test the effect of particle size on the rate of oxidation we prepared three samples of steel wool each with different levels of coarseness (s...
Organic Reaction pathways OCRAQAEdexcel Aliphatic routes Aromatic routes Learn the reagents and changes Enter your text here ...
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...