Drill

Determine the name of the following Molecules?

1. CO2

2. CO

Objective

The student will be able to: Complete practice problems in order to name

Acids and Bases.

SAT/HSA Enrichment

There are … Carbon atoms represented by 3Mg(HCO3)2

a. 2b. 3c. 5d. 6

Quiz

Naming Molecular Compounds!

Acid Demonstration

Demo I Pour approximately 50 mL of vinegar into 100

mL beaker. Take approximately 2 grams of sodium

bicarbonate (baking soda) and add it to the vinegar.

Acid Demonstration

Demo II Place 2 grams of mossy zinc in a large test

tube. Add approximately 10 mL of 3M hydrochloric

acid to the test tube. Immediately loosely stopper the test tube. Light a wooden splint. Remove the stopper and place wooden splint

near the mouth of the test tube.

Acid Demonstration

Demo III Pour 250 mL of 0.1 NaOH into a 1000 mL

Erlenmeyer flask. Add a few drops of phenolphthalein indicator

to the solution. Place solution on a magnetic stirrer. While stirring, add 50 mL of 3 M HCl solution.

Acid Demonstration

All the reactions involve acids and we will be studying many reactions that involve acids.

Therefore, you should know how to name and write the formulas of acids.

Naming and Writing Formulas for Acids and Bases

How are they named?

Naming and Writing Formulas for Acids and Bases

Some ants can give painful stings when threatened or disturbed. Certain ant species called formicines have poison glands that produce venom containing formic acid. You will learn the names and formulas of some important acids such as formic acid.

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

Naming Acids

Three rules can help you name an acid with the general formula HnX.

When the name of the anion (X) ends in -ide, the acid name begins with the prefix hydro-.

The stem of the anion has the suffix -ic and is followed by the word acid.

Naming Acids

Naming Acids

When the anion name ends in -ite, the acid name is the stem of the anion with the suffix -ous, followed by the word acid.

9.4

When the anion name ends in -ate, the acid name is the stem of the anion with the suffix -ic followed by the word acid.

9.4

Naming Acids

A Summary of the Three Rules for Naming Acids.

Naming Acids

Use the rules for writing the names of acids in reverse to write the formulas for acids. What is the formula for hydrobromic acid?

Following Rule 1, hydrobromic acid (hydro- prefix and -ic suffix) must be a combination of hydrogen ion (H+) and bromide ion (Br–). The formula of hydrobromic acid is HBr.

Writing Formulas for Acids

Writing Formulas for Acids

Bases are named in the same way as other ionic compounds—the name of the cation is followed by the name of the anion. For example, aluminum hydroxide consists of

the aluminum cation (Al3+) and the hydroxide anion (OH–). The formula for aluminum hydroxide is Al(OH)3.

Names and Formulas for Bases

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

9.4

Names and Formulas for Bases

Cleaners and soap contain sodium hydroxide.

9.4

Names and Formulas for Bases

Section Quiz

1.The name for H2S(aq) is a. sulfuric acid.b. hydrosulfuric acid.c. sulfurous acid.d. hydrosulfurous acid.

2.The chemical formula for chlorous acid is a. HClO2.

b. HClO3.

c. HClO4.

d. HCl.

Section Quiz

3.The correct chemical name for NH4OH is a. nitrogen tetrahydrogen hydroxide.b. nitrogen pentahydrogen oxide.c. ammonium oxyhydride.d. ammonium hydroxide.

Section Quiz

Acids Organizer

Complete an Acid organizer

Acid Nomenclature

Complete Acid Nomenclature worksheet.

Summary Questions

1. What is the difference b/w the formulas of acids and bases?

2. What is the difference b/w naming an acid and base?

3. What do acids and bases have in common? What type of elements are the same in both?

4. When the anion ends in -ite the acid suffix is?5. When the anion ends in –ate the acid suffix is?

Homework

Naming Acids worksheet

Exit ticket: Naming Acids and Bases