(set 5) Writing Chemical Formulas & Compound Names
silver cyanide
AgCN
What is the formula for dinitrogen monoxide?
Aka Nitrous oxide, commonly known as laughing gas or nitrous, is a chemical compound, an oxide of nitrogen with the formula N 2O. At room temperature, it is a colorless, odorless non-flammable gas, with a slightly sweet taste. Nitrogen, N nonmetal -3 charge Oxygen, O nonmetal -2 charge use prefixes with nonmetal + nonmetal!!! (use charges with metal + nonmetal)
Aluminum phosphate
Al 3+ metal and nonmetals, P and O for Phosphate PO4 polyatomic ion known
Aluminum Chromate
Al2(CrO4)3
copper (II) sulfide
CuS transitional metal: copper (II) = Cu 2+ nonmetal sulfur: S has 2- charge
write the ionic compound formula for Iron(III) Bromide?
Fe = iron = metal 2+ or 3+ Br = Bromine (nonmetal) -1
calcium hypochlorite
Formula: Ca(ClO)2 calcium: metal 2+ charge chlorine nonmetal -1 charge
Hematite
Iron (III) oxide
potassium flouride
KF metal + nonmetal K + and F- so charges cancel out
lithium cyanide
LiCN
Magnesium Iodide
Mg +2 I -1
Magnesium Fluoride
Mg = metal F = nonmetal forms ion
Write the formula for copper(II) chloride
With Transitional metals, the charges may differ which is why we denote the charge of the transitional metal in parenthesis. Solution: Ions: cation=Cu2+ and anion=Cl- Formula: CuCl_2 Reasoning: 1 Cu2+ + 2 Cl- gives 1(+2) + 2(-1) = 0
What is the name of the compound with the formula NF3 ?
nitrogen trifluoride
Orpiment
Arsenic Sulfide
Boron Triiodide
B = metal I = nonmetal
What is the name of the compound with the formula BBr3?
Boron Tribromide boron (B) metalloid bromine (Br) nonmetal
calcite
Calcium Carbonate Ca 2+ Carbonate CO3 2-
Fluorite
Calcium Fluoride Ca 2+ F -1
What is the name of the compound with the formula CaO?
Calcium Oxide nonmetal + nonmetal use prefixes!
cobalt (II) selenide
CoSe
Molecular compounds use _______ ? Ionic Compounds use ________ ?
Molecular compounds: nonmetal + nonmetal Molecular compounds USE PREFIXES Example: N_2 + Cl_4 di-nitrogen + tetra-chloride = dinitrogen tetrachloride Ionic compounds: metal + nonmetal Ionic compounds USE SUBSCRIPTS to represent ion charges To write formula: (1) write cation and charge (2) write anion and charge (3) if the charges are not the same then the swap charges for subscripts! Example: Write formula for Calcium bromide metal: Calcium - gives cation nonmetal: bromide - gives anion We have ==> Ca with 2+ Br with -1 Hence, Ca 2+ and Br - gives CaBr_2 ****Binary compounds**** compounds with only two elements, ALWAYS END IN "ide"
Sodium Flouride
NaF
Phosphorus pentachloride
P = nonmetal Cl = nonmetal *use prefixes!
Phosphorus triiodide
Phosphorus (P) nonmetal, -3 charge Iodine (I) nonmetal, -1 charge
What is the formula for sulfur trioxide ?
S = nonmetal (sulfur) O = nonmetal (oxygen)
What is the name of the compound with the formula NaI?
Sodium Iodide metal + nonmetal Na +1 charge Iodide -1 charge
What is the name of the compound with the formula SF6 ?
Sulfur Hexafluoride
What is the name of the compound with the formula BaCl2?
barium Chloride metal + nonmetal Barium has 2+ charge Chloride has -1 charge
What is the name of the compound with the formula BF3 ?
boron trifluoride boron (B) metalloid Fluorine (F) nonmetal
gypsum
calcium sulfate dihydrate
Calcium perchlorate
calcium: metal, 2+ charge per-chlorate is nonmetal -1 charge
