formulas test 2

naming ionic compounds with polyatomic ions

metal unmodified (fixed or variable) and polyatomic anion Ex. Sr(NO3)2= strontium nitrate Ba(ClO)2= Barium hypochlorite CuSeO3= Cupric Selenite or Copper(II) selenite (you must calculate Cu)

EF rounding rules

- 0.9 round up -0.1 round down -between 0.1 or 0.9 cannot round

% yield

actual/theoretical x 100

% purity

g pure/g impure X 100

Empirical formula

-Simplest formula MF: N2O4 EF: NO2

Desity of water

1g/ 1ml

1 mol

6.02 x 10^23 (particles, molecules, formula units)

ER leftover

ER initial - ER reacted

metals of fixed charge

Group 1 and 2, Al+3, Zn+2, Cd+2, Ag+

Dilution formula

M1V1 = M2V2

mass% of element

g element/ g compound X 100

mass % percent of a solution

g solute/ g solution X 100 g solution= grams of solute + grams of solvent

naming binary acid

hydro + _____ + ic acid ex. HCl is Hydrochloric acid When they have an H in front

Molarity

moles/ liters

Molecular formula

n x EF n= MF mass/EF mass

hydrate naming

name compound + prefix-hydrate ex. CuSO4 · 5 H2O is copper(II) sulfate pentahydrate

naming ionic compounds with metals of variable charge

name of metal unmodified (charge in Roman numeral) and name of nonmetal modified to end in "ide" (you have to calculate for the unfixed charge) ex. Mn2S= Manganese(I) sulfide Cr3N2= Chromium(II) Nitride

naming ionic compounds with metal of fix charged

name of the metal (unmodified) and name of nonmetal "ide" ex. Al2O3= aluminum oxide BaCl2= Barium Chloride Na2S= Sodium sulfide

naming covalent compounds

prefix(except mono) and prefix nonmetal name modified to end in "ide" ex. N204= dinitrogen tetroxide H2O= dihydrogen monoxide