1.3 Volumetric Analysis Flashcards
(30 cards)
Stoichiometric ratio
The proportional relationship between reactants and products.
Titration purpose
Determining concentration of an unknown solution.
Process of titration
Slow addition of one solution of a known concentration (titrant) to a known volume of another solution of unknown concentration, until the reaction reaches neutralisation, which is indicated by a colour change.
Mass (m)
Measure of amount of matter (g)
Volume (V)
Space that a substance occupies (L or dm^3)
Density (p)
Mass per unit volume (kgL-1)
Avogadro’s constant
NA=6.022x10^23
Number of fundamental particles contained in exactly 12g of carbon-12.
Mole (n)
Measure of amount of fundamental particles in a given mass of material (mol)
Molar mass (M)
Mass of one mole of a substance (gmol-1)
Number of moles (n) formula
n=m/M
where M=molar mass, m=mass, n=number of moles
Mass concentration (p)
Mass of solute per litre of solution (gL-1)
Mass concentration (p) formula
p=m/V
where p=mass concentration, m=mass, V=volume
Molar concentration/molarity (c)
Moles of solute per litre of solution (molL-1)
Molar concentration (c) formula
c=n/V
where c=molar concentration, n=number of moles, V=volume
Percentage weight per volume (%w/v)
Mass of solute per 100mL of solution (g100mL-1)
Percentage weight per volume (%w/V) formula
%w/V = p x 100%
where %w/V=percentage weight per volume, p=density
Parts per million (ppm) equivalent
mgL-1
Parts per billion (ppb) equivalent
µgL-1
%w/v equivalent
g 100mL-1
molL-1 to gL-1
xM
gL-1 to molL-1
/M
%w/v to gL-1
x10
gL-1 to %w/v
/10
gL-1 to ppm
x10^3
