Amount Of Substance Flashcards
What is the ideal gas equation?
pV=nRT
What is the % yield?
Actual yield/ theoretic yield X100
How do you calculate concentration in moldm-3
Moles/vol (dm3)
How do you calculate concentration in gdm-3
Concentration in Moldm-3 X Mr
What are concordat results?
Results within 0.10 of each other (including the trail experiment if 3 concordat results can’t be found)
How do you calculate percentage purity?
Mass of pure substance (g) / mass of impure sample (g) X100
How can you increase atom economy’s?
Find a suitable market to sell the other products
What is % atom economy?
Mass of desired product / total mass of reaction X100
What is the difference between empirical and molecular formula?
Empirical= smallest whole number ratio Molecular= actual ratio
What is relative molecular mass?
The average mass of one molecule relative to 1/12th the mass of a C-12 atom?
What is relative atomic mass?
The weighted average mass of 1 atom of an element taking into account all naturally occurring isotopes relative to 1/12th the mass of a C-12 atom
How do you calculate moles?
Mass/ Mr
How many particles are in 1 mole of a substance?
6.02x10^23
Avogadro’s constant
How do you write an ionic equation?
1) stoichiometric equation
2) seperate ions for (aq) solutions
3) cancel same ions
How do you convert from C to K?
Add 273
