Formulae, equation calculations

WRITE EQUATIONS

WORD Na2CO3 + 2HCl → 2NaCl + H2O + CO2

CHEMICAL sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide



CuS Copper Sulfide (metal + nonmetal)

CuSO4 Copper Sulfate (metal + nonmetal + something else)

Mg0 = Magnesium Oxide (metal + oxide)


ACIDS CH4 = methane NO3 = nitrate
NH3 = ammonia SO4 = sulfate
HCl = hydrochloric NH4 = ammonium CO3 = carbonate
HNO3 = nitric OH = hydroxide
H2SO4 = sulphuric

ENDINGS BEGINNINGS


-ide = positive : negative ion mono- = 1 (CO = Carbon Monoxide)
-ate = positive : negative ion (contains O2) di- = 2 (CO2 = Carbon Dioxide)
tri- = 3 (CO3 = Carbon Trioxide)




BALANCING EQUATIONS




FINDING THE RELATIVE FORMULA MASS (Eg: H2SO4 )

a) Search in periodic table for H d) search in periodic table for S
b) Times num at the top by 2 (H2) e) Times number at the top by 1 (S)
c) 1x2= 2 f) 1x32= 32



g) Search in periodic table for O To know the total relative mass, we add all the
h) Times num at the top by 4 (O4) calculations together.
i) 4x16=64 2 + 32 + 64= 98