C5 Flashcards
What is the theoretical yield?
The maximum mass possible to make from a given mass of reactant
Theoretical yield is a crucial concept in stoichiometry and helps in determining how much product can be expected from a reaction.
What is the formula for calculating theoretical yield?
mass of limiting reactant / sum of Mr for limiting reactant x sum of Mr for product
This formula helps in quantifying the expected yield of a chemical reaction based on the reactants used.
Fill in the blank: The theoretical yield is calculated using the formula: mass of limiting reactant / sum of Mr for limiting reactant x sum of Mr for _______.
product
This emphasizes the importance of the product’s molar mass in yield calculations.
True or False: The theoretical yield can exceed the actual yield in a chemical reaction.
True
Theoretical yield represents an ideal scenario, while actual yield can be affected by various factors.
Percentage yield definiton
Overall success of experiment
Percentage yield formula
actual yield / theoretical yield x 100
Percentage yield is affected if
Reactants react in a different way than expected
Not completed
Product is lost after seperated
Atom Economy definiton
Measure of how many atoms in the reactants form a desired product
Atom economy formula
sum of Mr of desired product / sum of Mr of all products x 100
Concentration formula
mass of solute / volume of solute
How to carry out a titration
1.) add known volume of alkali to conical flask
2,) Add few drops of a single indicator
3.) Add acid to flask using a burette
4.) When acid is neutralised the indicator will change colour, stop adding acid
Phenolphthalein colours in acid and alkali
Pink in acid
Colourless in alkali
Methyl orange colours in acid and alkalis
Red in acids
Yellow in alkalis
Concentration formula
number of moles / volume of solution
What is the molar volume
Volume occupied by one mole of gas
molar volume formula
gas volume / number of moles
amount in mol formula
volume in dm ^3 / 24dm^3
