Quantitative Chemistry PAPER 1 Flashcards
What is the law of conservation?
That no atoms are lost or gain in a reaction. The mass of the reactants is equal to the mass of products. Therefore, no mass is lost or gained
What is the formula for percentage yield?
Actual yield / theoretical yield
How do you convert cm into dm?
Cm ÷ 1000
What is the formula for moles?
Mass ÷ Mr
What is the formula for atom economy
Relative formula mass/ all reactants x100
What is the formula for concentration (g/dm)?
Mass ÷ volume
What is the formula for concentration (mol/dm)?
Moles / volume
What is avogadro constant?
The amount of particles one mole contains which is 6.02×10²³
What is actual yield?
The amount of product formed from a reaction
What is a limiting reactant?
The reactant that is used up first. Not in excess
why should a white tile be place under conical flask in titration?
To ensure colour change can be observed
what are two improvements that can be made in titration?
swirl the flask
use a white tile
repeat and calculate mean
why is a burrette used in titration?
As it allows small increments of the solution to be dropped.
can measure in small intervals
what is polystrene?
A insultator/ poor heat conductor
what is a weak acid?
A solution that is partially ionised which produces hydogen ions in an aqueous solution
