C3 - Quantitative Chemistry Flashcards
What is the law of conservation of mass?
No atoms are made or lost for the products = reactants
What are the 2 iron ions?
Fe2+
Fe3+
What are the 2 copper ions?
Cu+
Cu2+
What is the ion of lead ?
Pb2+
What is the ion for hydroxide?
OH-
What is the ion for nitrate ?
NO3^-
What is the ion for sulfate?
SO4^2-
What is the ion for carbonate?
CO3^2-
What is the ion for ammonium?
NH4^+
What is the ion for nitrite?
NO2^-
What is the ion for phosphate?
PO4^3-
What is the formula of bromate?
BrO3^-
What is the formula for nitric acid ?
HNO3
What is the formula of sulfuric acid?
H2SO4
What does abundance mean?
Abundance is how common an isotope is
What is the formula for moles?
Mr x Moles = Mass
What is avagadros constant ?
6.02 x 10^23
What is the limiting reactant ?
Reactant that is fully used up
What is an excess reactant ?
Reactant that isn’t used up
What is the formula for percentage yield?
Mass of product actually made / Max theoretical mass of product x 100
What is the formula of atom economy?
Relative formula mass of desired product (in reaction) / Sum of relative formula mass of all reactants (in reaction) x 100
Why is it not always possible to get a 100% yield?
- Some products may be lost
- Some reactants could react in a different way to expectation
- Reversible reactions may not go to completion
How do you calculate the relative formula mass?
Add all the relative atomic masses together
What is the formula for concentration g/dm^3) ?
Mass(g) / Volume (dm^3)
How do you calculate the RF value in chromatography?
Distance moved by substance / Distance moved by solvent
How do you work out the number of particles in a substance ?
Moles x Avagadros Constant
How do you work out concentration (mol/dm^3) ?
Moles / Volume (dm^3)
How do you work out the volume of gas at room temp and pressure (dm^3) ?
Moles x 24
How do you convert from cm^3 to dm^3 ?
Divide by 1000
Why is a high atom economy important ?
Important for sustainable development
