Finding the formula of a hydrocarbon from gas volumes
This leads on directly from the previous position molar volume . The video works through a problem to find the
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Category: Fundamentals
How to find the volume of gas in a reaction
Avogadro’s law is the basis for calculating the volume of gas produced in a reaction: equal volumes of gases at
Determining an empirical formula using combustion analysis
Combustion analysis is a simple technique used to find the empirical formula of a compound – often an organic or
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Finding the formula of a hydrated salt
Finding the formula of a hydrated salt is no different than determining the empirical formula of any other compound –
Determining the limiting reactant in a reaction
Limiting reactant problems follow on directly from reacting mass calculations. In these questions, you have to figure out which reactant
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Percentage yield calculations
Percentage yield is one of many deciding factors in determining whether or not a reaction is economically viable. It compares
Reacting mass calculations
The key to reacting mass calculations at A level is to have a foolproof method for setting them out so
Empirical vs. molecular formulae
Empirical formula: simplest ratio of the atoms of different elements in a compound Molecular formula: the actual number of each
Working with different units in chemistry
Factor Name Unit Common examples 106 mega M 103 kilo k kg 10-1 deci d dm 10-2 centi c cm
Atom economy
Atom economy or percentage atom economy is simply a measure of how ‘green’ a chemical process is – it essentially