1 - Amount of Substance Flashcards
SI Units
dm^3
m
Pa
Kelvin
Volume of gas (dm^3)
24n
Ideal Gas Equation
pressure x volume = moles x R x temp
pV = nRT
(Volume is in m^3)
R = 8.314
Titrations Equation
n = cv
moles = concentration x volume
concentration = mol /dm^3
volume = dm^3
how to make sure titre weight is accurate
weight by difference
transfer the washings
measuring knows volume in titration
wash pipette with distilled water to remove unwanted chemicals
wash it with alkali (substance ur trying to find conc of) to ensure the water doesn’t dilute it
why funnel is removed in titration
prevents acid from dripping from funnel to biurette
why conical flask is swirled during titration
to ensure acid and alkali fully react and are mixed thoroughly
how to determine accurate mass of solid in titration
Place weighing boat on balance
Zero the balance
Add solid and weigh
Add solid to beaker and wash residue into beaker
