Hydrates Compounds containing Water molecules

MgSO4 7H2O Magnesium Sulfate heptahydrate

CaSO4 2H2O Calcium Sulfate dihydrate

Ba(OH)2 8H2O Barium Hydroxide octahydrate

CuSO4 5H2O Copper II Sulfate pentahydrate

Na2CO3 10H2O Sodium Carbonate decahydrate

Examples of Names and Formulas of Oxoanions and Their Compounds - I

• KNO2 Potassium Nitrite BaSO3 Barium Sulfite

• Mg(NO3)2 Magnesium Nitrate Na2SO4 Sodium Sulfate

• LiClO4 Lithium Perchlorate Ca(BrO)2 Calcium Hypobromite

• NaClO3 Sodium Chlorate Al(IO2)3 Aluminum Iodite

• RbClO2 Rubidium Chlorite KBrO3 Potassium Bromate

• CsClO Cesium Hypochlotite LiIO4 Lithium Periodate

Examples of Names and Formulas ofOxoanions and their Compounds - II

• Calcium Nitrate Ammonium Sulfite

• Strontium Sulfate Lithium Nitrite

• Potassium Hypochlorite Lithium Perbromate

• Rubidium Chlorate Calcium Iodite

• Ammonium Chlorite Boron Bromate

• Sodium Perchlorate Magnesium Hypoiodite

Examples of Names and Formulas ofOxoanions and their Compounds - II

• Calcium Nitrate Ca(NO3)2 Ammonium Sulfite (NH4)2SO3

• Strontium Sulfate SrSO4 Lithium Nitrite LiNO2

• Potassium Hypochlorite KClO Lithium Perbromate LiBrO4

• Rubidium Chlorate RbClO3 Calcium Iodite Ca(IO2)2

• Ammonium Chlorite NH4ClO2 Boron Bromate B(BrO3)3

• Sodium Perchlorate NaClO4 Magnesium Hypoiodite Mg(IO)2

Determining Names and Formulas of Ionic Compounds Containing Polyatomic Ions

a) BaCl2 5 H2O

b) Magnesium Perchlorate

c) (NH4)2SO3

d) Calcium Nitrate

Determining Names and Formulas of Ionic Compounds Containing Polyatomic Ions

a) BaCl2 5 H2O Ba+2 is the cation Barium, Cl- is the Chloride anion. There are five water molecules thereforethe name is: Barium Chloride Pentahydrate

b) Magnesium Perchlorate Magnesium is the Mg+2 cation, and perchlorate is the ClO4

- anion, therefore we need two perchlorate anions for each Mg cation therefore the formula is: Mg( ClO4)2

c) (NH4)2SO3 NH4+ is the ammonium ion, and SO3

-2 is the sulfite anion, therefore the name is: Ammonium Sulfited) Calcium Nitrate Calcium is the Ca+2 cation, and nitrate is the NO3

- anion, therefore the formula is: Ca(NO3)2

Naming Acids

1) Binary acids solutions form when certain gaseous compounds dissolve in water. For example, when gaseous hydrogen chloride (HCl) dissolves in water, it forms a solution called hydrochloric acid. Prefix hydro- + anion nonmetal root + suffix -ic + the word acid hydrochloric acid

2) Oxoacid names are similar to those of the oxoanions, except for two suffix changes: Anion “-ate” suffix becomes an “-ic” suffix in the acid. Anion “-ite” suffix becomes an “-ous” suffix in the acid. The oxoanion prefixes “hypo-” and “per-” are retained. Thus, BrO4

-

is perbromate, and HBrO4 is perbromic acid; IO2- is iodite, and

HIO2 is iodous acid.

Determining Names and Formulas ofAnions and Acids

Problem: Name the following anions and give the names and formulas of the acid solutions derived from them: a) I - b) BrO3

- c) SO3-2 d) NO3

- e) CN -

Solution: a) I -

b) BrO3-

c) SO3-2

d) NO3-

e) CN -

Determining Names and Formulas ofAnions and Acids

Problem: Name the following anions and give the names and formulas of the acid solutions derived from them: a) I - b) BrO3

- c) SO3-2 d) NO3

- e) CN -

Solution: a) The anion is Iodide; and the acid is Hydroiodic acid, HI

b) The anion is Bromate; and the acid is Bromic acid, HBrO3

c) The anion is Sulfite; and the acid is Sulfurous acid, H2SO3

d) The anion is Nitrate; and the acid is Nitric acid, HNO3

e) The anion is Cyanide; and the acid is Hydrocyanic acid, HCN

Names and Formulas of Binary Covalent Compounds

1) The element with the lower group number in the periodic table is the first word in the name; the element with the higher group numberis the second word. (Important exception: When the compound contains oxygen and a halogen, the halogen is named first.)

2) If both elements are in the same group, the one with the higher period number is named first.

3) The second element is named with its root and the suffix “-ide.”

4) Covalent compounds have Greek numerical prefixes (table 2.6) toindicate the number of atoms of each element in the compound. Thefirst word has a prefix only when more than one atom of the elementis present; the second word always has a numerical prefix.

Determining Names and Formulas of Binary Covalent Compounds

Problem: What are the name or chemical formulas of the followingchemical compounds:

a) Carbon dioxide b) PCl3 c) Give the name and chemical formula of the compound formed from two P atoms and five O atoms.

Solution:a) Carbon dioxide

b) PCl3

c) The compound formed from two P atoms and five O atoms

Determining Names and Formulas of Binary Covalent Compounds

Problem: What are the name or Chemical formulas of the followingChemical compounds:

a) Carbon dioxide b) PCl3 c) Give the name and chemical formula of the compound formed from two P atoms and five O atoms.

Solution:a) The prefix “di-” means “two.” The formula is CO2

b) P is the symbol for phosphorous; there are three chlorine atoms which require the prefix “tri-.” The name of the compound is: phosphorous trichloride

c) P comes first in the name (lower group number). The compound is diphosphorous pentaoxide ( commonly called “phosphorous pentaoxide”)

Naming Alkanes

Alkanes are hydrocarbons that are called “saturated” hydrocarbons, they contain only single bonds, no multiple bonds !

Alkanes have the general formula --- C n H 2n+2

Each carbon atom has four bonds to others atoms !

The names for alkanes all end in -ane

Alkanes are found in three distinct groups:

a) Straight chain hydrocarbons b) Branched chain hydrocarbons c) Cyclic hydrocarbons

Calculate the Molecular Mass of Glucose: C6H12O6

• Carbon

• Hydrogen

• Oxygen

Calculate the Molecular Mass of Glucose: C6H12O6

• Carbon 6 x 12.011 g/mol = 72.066 amu

• Hydrogen 12 x 1.008 g/mol = 12.096 amu

• Oxygen 6 x 15.999 g/mol = 95.994 amu

180.156 amu

Calculating the Molecular Mass of a CompoundProblem: Using the data in the periodic table, calculate the molecular mass of the following compounds: a) Tetraphosphorous decoxide b) Ammonium sulfatePlan: We first write the formula, then multiply the number of atoms (or ions) of each element by its atomic mass, and find the sum.Solution:

a) Tetraphosphorous decoxide

b) Ammonium sulfate

Calculating the Molecular Mass of a CompoundProblem: Using the data in the periodic table, calculate the molecular mass of the following compounds: a) Tetraphosphorous decoxide b) Ammonium sulfatePlan: We first write the formula, then multiply the number of atoms (or ions) of each element by its atomic mass, and find the sum.Solution:

a) The formula is P4O10. Molecular mass = (4 x atomic mass of P ) +(10 x atomic mass of O ) = ( 4 x 30.97 amu) + ( 10 x 16.00 amu) = 283.88 = 283.9 amub) The formula is (NH4)2SO4

Molecular mass = ( 2 x atomic mass of N ) + ( 8 x atomic mass of H) + ( 1 x atomic mass of S ) + ( 4 x atomic mass of O) = ( 2 x 14.01 amu) + ( 8 x 1.008 amu) + ( 1 x 32.07 amu) + ( 4 x 16.00 amu) = 132.154 amu = 132.15 amu

(Figs. on p. 75)

Figs. on p. 75

(Figs. on p. 75)

Figs. on p. 75

Fig.2.25

Mixtures

Heterogeneous mixtures : has one or more visible boundaries between the components.

Homogeneous mixtures : has no visible boundaries because the components are mixed as individual atoms, ions, and molecules.

Solutions : A homogeneous mixture is also called a solution. Solutions in water are called aqueous solutions, and are very important in chemistry. Although we normally think of solutions as liquids, they can exist in all three physical states.

Separating MixturesFiltration : Separates components of a mixture based upon differences in particle size. Normally separating a precipitate from a solution, or particles from an air stream.Crystallization : Separation is based upon differences in solubility of components in a mixture.

Distillation : separation is based upon differences in volatility.

Extraction : Separation is based upon differences in solubility in different solvents (major material).

Chromatography : Separation is based upon differences in solubility in a solvent versus a stationary phase.

Fig 2D (P 77) Filtration

Fig 2E (P 77)Crystallization

Fig.2.F

Fig.2.G

Fig.2.H

Fig.2.I

Fig.2.26