Review Quiz and Introduction to Review Quiz and Introduction to Acids/Bases/pH ScaleAcids/Bases/pH Scale

ReviewReview

1. What is an ion?1. What is an ion?1. An ion is an atom that has lost or gained an electron1. An ion is an atom that has lost or gained an electron

2. What is a chemical reaction? Click Here to See a Chemical Reaction2. What is a chemical reaction? Click Here to See a Chemical Reaction2. A chemical reaction is the process by which one or more substances 2. A chemical reaction is the process by which one or more substances

change to produce one or more different substances change to produce one or more different substances 3. What is a cation?3. What is a cation?

3. A cation is a positively charged ion3. A cation is a positively charged ion4. What is a Chemical Equation4. What is a Chemical Equation

4. A shorthand of a chemical reaction using chemical formulas and 4. A shorthand of a chemical reaction using chemical formulas and symbolssymbols

Ex: C+OEx: C+O22COCO22

reactantsreactants products products5. What is an anion5. What is an anion

5. An anion is a negatively charged ion5. An anion is a negatively charged ion

Need extra help?Need extra help?

Go to Chemistry tutorials at Go to Chemistry tutorials at http://www.wwnorton.com/chemistry/homehttp://www.wwnorton.com/chemistry/home.htm.htm

Go to the online text at Go to the online text at http://my.hrw.comhttp://my.hrw.com Go to the class website at Go to the class website at

www.classhomework.comwww.classhomework.com

BackBack

AcidsAcids

Reaction:Reaction:

Produce HProduce H++ (as H (as H33OO

++) ions in water) ions in water

Acids contain HAcids contain H++ cations, that react with cations, that react with metals and produce H gas.metals and produce H gas. HCl + Na = NaCl + HHCl + Na = NaCl + H(g)(g)

Acid + Metal = Product + H GasAcid + Metal = Product + H Gas

AcidsAcids

Properties:Properties: Acids taste sour.Acids taste sour. Acids turn Acids turn Litmus paper Litmus paper

REDRED

Corrode metalsCorrode metals

React with bases to React with bases to

form salts and waterform salts and water

BasesBases

Reaction:Reaction: Bases contain an OHBases contain an OH-- anion, that react anion, that react

with acids, producing liquid Hwith acids, producing liquid H22O.O. HCl + NaOH = HHCl + NaOH = H22O + NaClO + NaCl Acid + Base = Water + ProductAcid + Base = Water + Product

See movie (on hardrive) on the See movie (on hardrive) on the InternetInternet

BasesBases

Properties:Properties: Bases taste bitter.Bases taste bitter. Bases feel slippery.Bases feel slippery. Bases turn Bases turn Litmus paper Litmus paper

BLUEBLUE..

Produce OHProduce OH-- ions in water ions in water

Taste bitter, chalkyTaste bitter, chalky

Are electrolytesAre electrolytes

React with acids to form React with acids to form

salts and watersalts and water

Check for UnderstandingCheck for UnderstandingPost your answers on the class Post your answers on the class

newsgroup.newsgroup.Describe the solution in each of the Describe the solution in each of the

following as: following as: 1) acid 2) base or 3)neutral.1) acid 2) base or 3)neutral.

A. ___sodaA. ___soda

B. ___soapB. ___soap

C. ___coffeeC. ___coffee

D. ___ wineD. ___ wine

E. ___ waterE. ___ water

F. ___ grapefruitF. ___ grapefruit

Check for Understanding Check for Understanding Answers:Answers:

Describe each solution as: Describe each solution as:

1) acid 2) base or 3) neutral.1) acid 2) base or 3) neutral.

A. A. _1__1_ soda soda

B. B. _2__2_ soap soap

C. C. _1__1_ coffee coffee

D. D. _1__1_ wine wine

E. E. _3__3_ water water

F. F. _1__1_ grapefruit Need Help grapefruit Need Help

Common Acids & BasesCommon Acids & Bases

AcidsAcids:: HClHCl

In your tummy! Human In your tummy! Human Digestive AcidDigestive Acid

CC66HH88OO77

Citric Acid (Lemon)Citric Acid (Lemon)

CC22HH44OO22

Acetic Acid/VinegarAcetic Acid/Vinegar

BasesBases:: NaOHNaOH

Cleaners, soap, Cleaners, soap, Drano, and HominyDrano, and Hominy

KOHKOH FertilizerFertilizer

Mg(OH)Mg(OH)22

Stomach medicine, Stomach medicine, Milk of MagnesiaMilk of Magnesia

Common Acids & BasesCommon Acids & Bases

pH scalepH scale

The pH scale orders acids and The pH scale orders acids and bases.bases.

Great Resource:Great Resource:

Help and explanations can be found at Help and explanations can be found at http://www.school-for-champions.com/sciehttp://www.school-for-champions.com/science/chemacids.htm nce/chemacids.htm