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Professions and Applied Sciences
How to Calculate Atomic Mass Practice Problems
This Chemistry lesson is titled How to Calculate Atomic Mass Practice Problems and will give a detailed explanation of the topic.
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Y11 Reacting Mass Questions 5 and 6.
Both of these involve reactions with hydrochloric acid and both involve interpretations from a graph, where kinetics is also tested. Question 5 looks at the reaction between CaCO3 and HCl and then determines the identity of M in M(OH)2. Question 6 looks at the reaction between Mg and HCl. Note that 9min30s into the snapkast I wrote the formula CaCl2 where I should have written CaCO3.
Calculating Molecular Formula from Empirical Formula
This Chemistry lesson is titled Calculating Molecular Formula from Empirical Formula and will give a detailed explanation of the topic.
CH 8 CHEMISTRY LEWIS DOT STRUCTURES
How to build Lewis Dot Structures for Covalent molecules or Molecular Compounds.
Esters 6. Alkaline hydrolysis of esters (inc. saponification)
This short video looks at the alkaline catalysed hydrolysis of both simple and complex esters - the later making a soap in what is also known as a saponification reaction. The hydrolysis of ethyl ethanoate is shown first, followed by the hydrolysis (saponification) of tristearine. The next video in the series looks at how we determine the saponification value of a fat or oil.
Is an electrically neutral group of two or more atoms held together by covalent chemical bonds
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