Working with concentration
It is assumed that you covered the basics of concentration at GCSE. Essentially, you need to be able to work
Category: Calculations
EXAM STYLE QUESTIONS – GAS CALCULATIONS
If you come unstuck working through the questions, leave a comment and I’ll get back to you. Good luck 😊!
Finding the mass of a volatile liquid
We can use the ideal gas equation to find the molar mass (relative molecular mass) of a volatile liquid. In
The ideal gas equation
The ideal gas equation is an amalgamation of Boyle’s law, Charles’s law and Avogadro’s law and it describes the behaviour
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
Continue readingFinding the formula of a hydrocarbon from gas volumes
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
Continue readingDetermining an empirical formula using combustion analysis
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
Continue readingDetermining the limiting reactant in a reaction
Percentage yield calculations
Percentage yield is one of many deciding factors in determining whether or not a reaction is economically viable. It compares