C5 Monitoring and Controlling Chemical Reactions Flashcards
What is atom economy
The atom economy is a measure of how many atoms in the products make up the desired product.
What is the formula used to calculate atom economy
π΄π‘ππ πππππππ¦= (Sum of ππ ππ πππ ππππ πππππ’ππ‘/Sum of ππ ππ πππ πππππ’ππ‘s) x 100
What factors should be considered when making a substance?
Yield of the product
Atom economy
Usefulness of bi-products
Rate of reaction
Equilibrium position if reversible
What is Theoretical Yield
The theoretical yield is the maximum possible mass of desired products you can make from a given mass of reactants.
What is percentage yield
The percentage yield is the amount produced compared to your theoretical yield
How do you calculate percentage yield ?
πππππππ‘πππ π¦ππππ= (πππ‘π’ππ yield) / (π‘βπππππ‘ππππ πππ π ) π₯ 100
The equation for concentration
πͺππππππππππππ= π¨πππππ/π½πππππ
Give units for concentration
g/dm3 or mol/dm3
What pieces of equipment are needed to carry out a titration
Burette, volumetric pipette, pipette filler, conical flask, white tile, clamp and stand, indicator.
What are concordant titre values
When the titre values are within 0.10 cm3
What is molar volume
1 mole of any substance in the gas state occupies the same volume at the same temperature and pressure
At room temperature and pressure (RTP) this volume is 24dm3 or 24000cm3
Write down the gas equations
ππππ’ππ‘ (πππ)= (π£πππ’ππ (ππ3))/24
π£πππ’ππ (ππ3 )=ππππ’ππ‘ (πππ) π₯ 24
What is rate of reaction
Measure of how quickly reactants are used or products are formed
Give formulae for measuring rate
π ππ‘π ππ πππππ‘πππ= (π΄πππ’ππ‘ ππ πππππ’ππ‘ πππππ’πππ)/ππππ
π ππ‘π ππ πππππ‘πππ= (π΄πππ’ππ‘ ππ πππππ‘πππ‘ π’π ππ)/ππππ
What has to happen in order for a reaction to happen between 2 particles
The reacting particles need to collide
The collision needs to have enough energy (more than the activation energy) so that the particles will then react (bonds will break etc)