c3 Flashcards
(100 cards)
during a chemical reaction, what happens to mass?
mass is always conserved
what has happened if a mass seems to change in a chemical reaction?
there is usually a gas involved
if mass increases - reactant is a gas, before reaction gas was floating and mass didn’t count
if mass decreases - product is a gas and will escape
ion for Lithium
Li+
ion for sodium
Na+
ion for calcium
Ca 2+
ion for potassium
K+
ion for magnesium
Mg2+
ion for carbonate
CO3 2-
ion for sulphate
SO4 2-
ion for oxide
O2-
ion for sulphide
S2-
ion for hydroxide
OH-
ion for nitrate
NO3 -
ion for fluoride
F-
ion for chlorine
Cl-
ion for bromide
Br-
ion for iodide
I-
formula for water
H2O
formula for ammonia
NH3
formula for carbon dioxide
CO2
formula for hydrogen
H2
formula for chlorine
Cl2
formula for oxygen
O2
what are the state symbols?
(l) - liquid
(s) - solid
(g) - gas
(aq) - aqueous