(U1) Formulae, Equations And Amounts Of Substance Flashcards
Give the formula of a sulfate ion
SO42-
Give the formula of a sulfite ion
SO32-
Give the formula of a thiosulfate ion
S2O32-
Give the formula of a hydrogensulfate ion
HSO4-
Give the formula of a hydrogencarbonate ion
HCO3-
Give the formula of a carbonate ion
CO32-
Give the formula of a nitrate ion
NO3-
Give the formula of a nitrite ion
NO2-
Give the formula of a phosphate ion
PO43-
Give the formula of a chlorate ion
ClO3-
Give the formula of a hypochlorite ion
ClO-
Give the formula of a hydroxide ion
OH-
Give the formula of a dichromate ion
Cr2O72-
Give the formula of a chromate ion
CrO42-
Give the formula of a permanganate ion
MnO4-
Give the formula of an ammonium ion
NH4+
What is avogadro’s constant?
What is its value?
- The number of particles (atoms or molecules) in 1 mole of a substance
- 6.02 x 1023
Give the equation linking number of particles and moles
Moles = particles / avogadro’s constant
N = parti. / L
Parti.
N | L
Give the equation linking moles and mass
Moles = mass / relative formula mass
N = M / Mr
M
N | Mr
What is water of crystalisation?
Water which is chemically bonded within a crystal structure
What is an anhydrous salt?
What is a hydrated salt?
- Salt containing no water of crystallisation
- salt containing water of crystalisation
State the equation linking concentration, moles and volume
Conc (C) = number of mol (N) / volume (V)
N = C (moldm-3) x V (dm3)
N
C V