Covalent bonding can lead to the formation of lattices
Covalent bonds form when electrons are shared between nuclei Atoms which can form two or more covalent bonds can bond with other similar ato...
2240 Hits
Ice melts at 0 degrees C, Diamond remains solid until its temperature is above 3500 degrees
Look at the images of ice and diamond. In some senses you might say the two substances are similar. Both substances are solid,&n...
979 Hits
​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...
3383 Hits
Turmeric contains the aromatic compound Curcumin
Intro image OCROCR 2EdexcelAQA Enter your text here ... Enter your text here ... I had a dream! This presentation outlines the way i...
961 Hits
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...
6808 Hits
A 50% yield
In this section we consider how much product is formed by a chemical reaction . Some reaction processes are not very efficien...
6766 Hits
​Intro image Enter your text here ... Enter your text here ... Enter your text here ... Enter your text here ... Enter your text here ...
715 Hits
Students should: 1.10 describe these experimental techniques for the separation of mixtures: simple distillation fractional distillation filtrat...
6982 Hits
Calculating the number of moles knowing the mass and the Ar ( mass of one mole)
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...
2661 Hits
A mole of rice grains would form a huge mountain of rice with enough rice to feed the world's current population for the next 6088978 years!
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...
2590 Hits
Large numbers of coins can be counted by measuring their mass
1.26 "Counting" by measuring mass Sometimes chemists need to "count" out a specific number of atoms, ions or molecules of a substance....
2647 Hits
Relative masses allow chemists to "count out" atoms and molecules so they can ensure that the appropriate amounts of substances are reacted.
865 Hits
Relative masses allow chemists to "count out" atoms and molecules so they can ensure that the appropriate amounts of substances are reacted.
9259 Hits
​Intro image Enter your text here ... Enter your text here ... Enter your text here ... Enter your text here ... Enter your text here ... Enter your t...
2745 Hits
​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...
3579 Hits
Intro image Enter your text here ... Enter your text here ... Enter your text here ...
663 Hits
Organic Reaction pathways OCRAQAEdexcel Aliphatic routes Aromatic routes Learn the reagents and changes
2105 Hits
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...
3195 Hits
​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...
3368 Hits
Oxygen is a very reactive gas. It makes up approximately 20% of our atmosphere. ​The standard test for oxygen is to place a glowing...
4597 Hits