Chem Flashcards
A mole has the same number of specific entities as ____g of carbon isotope C12
12g
Inorganic materials:
Compounds not containing C-H bonds
Waters maximum density occurs at ___ degrees Celsius
4 degrees Celsius
Freezing point of water increases/decreases as pressure increases
Decreases
Value of Q at the start of a reaction:
0
Kc
Equilibrium constant
If Kc is a huge number then at equilibrium there are more/less products than reactants
More
Homogeneous mixtures
Everything evenly mixed through, Eg. solutions
Group of compounds that are soluble
Group 1
Mostly soluble compounds containing (apart from those containing Ag + and Pb 2+)
Cl -
Br -
I -
Soluble compounds:
NO3 -
HCO3 -
HSO4 -
Most electronegative element -
Fluorine
Mostly insoluble compound (except those with group 1 elements and Ba(OH)2)
Ca(OH)2 is still slightly soluble
OH-
All compounds containing ____ are soluble
NH4 +
All compounds are insoluble (apart from those defying other rules)
CO3 2-
PO4 3-
S 2-
Most compounds are soluble (apart from those containing Ba or Pb)
(Ca and Ag slightly soluble)
SO4 2-
Precipitates can be filtered from the mixture via
Filtration
Lewis acid:
Electron pair acceptor
Lewis base:
Electron pair donor
Bronsted-Lowry acid:
Proton donor
Bronsted-Lowry base:
Proton acceptor
To act as an acid a compound must have:
A H+ attached to an electronegative element via a polar bond
The strongest acids are usually:
A H+ attached to a halogen or oxygen
The larger the Ka value, the weaker/stronger the acid
Stronger
