1. Bellwork- Naming Salts

• NAME THE FOLLOWING

• NH 4 NO 3

• NaF

• Na 2 SO 4

• MgO

WRITE THE FORMULA FOR

• Magnesium hydroxide

• Aluminum nitrate

• Potassium iodide

2.

• • Carbon and oxygen combine to form carbon monoxide (CO) and carbon dioxide (CO 2 ), but these two invisible gases are very different.

3.

• • Small amounts of CO 2in the air do not present any problems.

• • Small amounts of CO in a room can be deadly.

• • A naming system that distinguishes between these two compounds is needed.

4.

Because two non-metals may combine in different ratios(ex. CO and CO 2 ),the quantity of each element must be specified in the name of a molecule.

5.

• • A prefix in the name of a binary molecular compound tells how many atoms of an element are present in each molecule of the compound.

6.

• • naming binary molecular compounds:

• • • • Name the elements in the order listed in the formula.

• • • • Use prefixes to indicate the number of each kind of atom.

7.

• • • • Dont use themono-prefix on the first element in the name.

• • • • The suffix of the name of the second element is - ide .

CO 2 carbon dioxide CO carbon monoxide 8.

• • The prefixes in the name tell you the subscript of each element in the formula.Write the correct symbols for the two elements with the appropriate subscripts.

Writing Formulas for Binary Molecular Compounds 9.

• • Silicon carbide is a hard material like diamond.

• • The namesilicon carbidehas no prefixes, so the subscripts of silicon and carbon must be one. Thus, the formula for silicon carbide is SiC.

10.

• 1. Which of the following compounds is named INCORRECTLY?

• • CS 2 , carbon disulfide

• • BCl 3 , boron trichloride

• • IF 7 , iodine heptafluoride

• • PCl 5 , phosphorus hexachloride

11.

• 2. Which of the following molecular compounds is named INCORRECTLY?

• • SbCl 3 , antimony trichloride

• • C 2 O 5 , dicarbon pentoxide

• • CF 4 , carbon tetrafluoride

• • H 3 As, hydrogen arsenide

12.

• 3. The correct formula fortetraphosphorus trisulfideis

• • P 3 S 4

• • S 3 P 4

• • P 4 S 3

• • S 4 P 3

13.

Section 9.4- Naming Acids and bases

14.

• • An acid is a compound that contains one or more hydrogen atoms and produces hydrogen ions (H + ) when dissolved in water.

15.

• • An acid is named after its anion.

• • anionending

• • -idehydro__________ic acid

• • -ite__________ous acid

• • -ate __________ic acid

Anion stem Anion stem Anion stem 16.

• • Acid formulas start with hydrogen & end with the formula of the anion.

• • • hydrobromic acid

• • • contains bromide (Br - )HBr

• • • sulfuric acid

• • • contains sulfate (SO 4 2- )H 2 SO 4

• • • sulfurous acid

• • • contains sulfite (SO 3 2- )H 2 SO 3

17. A base is a compound that produces hydroxide (OH - ) ions in water 18.

• • Bases are named in the same way as other ionic compounds the name of the cation is followed by the name of the anion.

• • • The formula for the base aluminum hydroxide is Al(OH) 3 .

19.

• • Sodium hydroxide (NaOH) is a base that is used to make paper.

20.

• • Cleaners and soap contain sodium hydroxide.

21.

• 1. The name for H 2 S(aq) is

• • sulfuric acid.

• • hydrosulfuric acid.

• • sulfurous acid.

• • hydrosulfurous acid.

9.4 Section Quiz 22.

• 2. The chemical formula for chlorous acid is

• • HClO 2

• • HClO 3

• • HClO 4

• • HCl

9.4 Section Quiz 23.

• 3. The correct chemical name for NH 4 OH is

• • nitrogen tetrahydrogen hydroxide.

• • nitrogen pentahydrogen oxide.

• • ammonium oxyhydride.

• • ammonium hydroxide.

9.4 Section Quiz 24. Dihydrogen monoxide DHMO ?It is in water sources everywhereIt is responsible for many deaths every year It is the most addictive substance known 25.

Bellwork- Mixed Naming

Name the following compounds.

1. CCl 4

2. SO 2

3. MgBr 2

4. NH 3

Write the chemical formula for the following compounds.

Dinitrogen tetroxide

Dinitrogen dioxide

26.

• • The rules for naming and writing formulas for compounds are possible only because compounds form from the elements in predictable ways.

• • • These ways are summed up in two laws: the law of definite proportions and the law of multiple proportions.

27.

• • Thelaw of definite proportionsstates that in samples of any chemical compound, the masses of the elements are always in the same proportions.

• • Ex. A sample of water always contains 8g O to every 1g H.

28.

• • Water obeys the law of definite proportions. In every sample of water, the mass ratio of oxygen to hydrogen is always 8:1.

29.

• • Hydrogen peroxide obeys the law of definite proportions. The mass ratio of oxygen to hydrogen is always 16:1.

30.

• • The law of multiple proportions : Some elements can combine to form more than one compound, in which the quantities of each element are always in a ratio of small whole numbers.

• • CompoundCOCO 2

• • Ratio 1:11:2

31.

Sulfur dioxideSulfur trioxide

SO 2 SO 3

1:2 ratio1:3 ratio

32.

• • A Diagram of the Law of Multiple Proportions

5 5 33.

• To use a flowchart to write the correct name for a compound, follow the arrows and answer the questions.

34. 35.

• • In writing a chemical formula from a chemical name, it is helpful to remember the following guidelines.

• • • An - ideending generally indicates a binary compound.

• • • An - iteor - ateending means a polyatomic ion that includes oxygen is in the formula.

36.

• • • Prefixes in a name generally indicate that the compound is molecular.

• • • A Roman numeral after the name of a cation shows the ionic charge of the cation.

37. 38.

• 1. The law of definite proportions states that in samples of any chemical compound, the elements are always in the same proportion by

• • mass.

• • volume.

• • group number.

• • period number.

Section Quiz 9.5. 39.

• 2. If you determine that the name of an ion ends in-iteor-ate , the ion is a

• • polyatomic cation.

• • polyatomic anion.

• • transition metal cation.

• • group A anion.