Quantitative Flashcards
(14 cards)
Equation for concentration
Concentration (g/dm³) = Moles/Volume (dm³)
Convert g dm-3 to mol dm-3
Divide by RFM
How to do acid and alkali titration
Rinse the piper with the solution of unknown concentration
Use a pipette to add known volume of alkali to conical flask
Add a few drops of indicator
Rinse and fill butter with acid
Gradually add the acid to conical flask
Record volume in the buttered when the indicator changes colour
Repeat until u have multiple results
Then find the mean
What is theoretical yield
The amount of product formed in perfect conditions
Calculation for percentage yield
Percentage Yield = (Actual Yield / Theoretical Yield) x 100
Why could actual yield and theoretical yield be different
Incomplete reaction
Unwanted side reactions
Solid lost while transferring beakers
What is atom economy
The efficient of a reaction
How much reactant turns into useful product
Atom economy equation
(mass of desired product / total mass of all reactants) x 100
Why might one reaction be chosen over another
Higher atom economy
Higher yield
Faster rate
Avogadros law state about gas volume
Same temperature and pressure = gas the occupy same volume
What is molar volume of a gas
The volume occupied by one mile of molecules of any gas at room temperature or pressure
What is room temperature and pressure
20 degrees
1 atmosphere
How can molar volume of a gas be calculated
Molar volume = volume dm3/moles of gas
