(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