3.1.2.5 Balanced Equations and Associated Calculations Flashcards
Content
How to balance equations?
Add numbers before each atom on either side of the equation to make each element equal
How to write ionic equations?
A balanced normal equation then split up all of the ionic compounds and remove any spectator ions
What is Atom Economy?
Atom economy is a measure of the proportion of reactant atoms that become part of the desired product
Atom economy = Mr of deisred / Mr of total reactants
How will a high atom economy help the environment?
High atom economy will make more efficent use of its materials therefore not a lot is wasted which could lead to the pollution
While a low atom economy will want more reactant so more digging of the environment
How will a high atom economy help the social?
Cheaper ways for pharmacutical companies to make medicine therefore lead to cheaper medicines
How will a high atom economy help the industry?
Many elements are rare therefore using them efficently will mean that the process is sustainable
What is percentage yield?
Percentage yield = Actual yield/Theoretcial yield
How to work outthe theoretical yield?
A molar ratio calculation
Why won’t the actual mass be the same as the theoretical?
Chemical don’t fully react
Poor practical technique
Left on filter paper/beakers etc
What is meant by molar volume?
The volume occupided by 1 mole of gas
This is 24dm^3
