Let’s Play Hangman. What’s the Word?  Two kinds of substances that dissociate into ions in solution.  These types of solutions make for very efficient.

Let’s Play Hangman

What’s the Word?  Two kinds of substances that dissociate into ions in solution.  These types of solutions make for very efficient cleaning products and can be found around the house. A C I D S & B A S E S Play Acids & Bases Brainpop VideoPlay My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acids & Bases 3.What is the name of this scale and what does it measure? The pH Scale determines if a substance is an acid or a base.

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com pH Scale The pH scale determines if a substance is an Acid or a Base.The pH scale determines if a substance is an Acid or a Base. PH stands for ‘Potential of Hydrogen.’PH stands for ‘Potential of Hydrogen.’ The scale goes from zero to fourteen.The scale goes from zero to fourteen. Acids are on the low end and bases are on the high end of the scale.Acids are on the low end and bases are on the high end of the scale. Seven is the middle of the scale and is neutral.Seven is the middle of the scale and is neutral. Lemons are acidic, with a low pH.Lemons are acidic, with a low pH. Soap is basic, with a high pH.Soap is basic, with a high pH. Water is neutral, with a pH of 7.Water is neutral, with a pH of 7. The pH scale determines if a substance is an Acid or a Base.The pH scale determines if a substance is an Acid or a Base. PH stands for ‘Potential of Hydrogen.’PH stands for ‘Potential of Hydrogen.’ The scale goes from zero to fourteen.The scale goes from zero to fourteen. Acids are on the low end and bases are on the high end of the scale.Acids are on the low end and bases are on the high end of the scale. Seven is the middle of the scale and is neutral.Seven is the middle of the scale and is neutral. Lemons are acidic, with a low pH.Lemons are acidic, with a low pH. Soap is basic, with a high pH.Soap is basic, with a high pH. Water is neutral, with a pH of 7.Water is neutral, with a pH of 7. Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acids & Bases 9.One property of bases is that they feel ___ and taste ___. BASES ARE SLIPPERY AND TASTE BITTER Soap Video Slippery Soap Video pH Brainpop Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acids & Bases 10.What substance would be good at cleaning pots and pans, without harming them? A. pH of 2 B. pH of 7 C. pH of 4 D. pH of 12 10.What substance would be good at cleaning pots and pans, without harming them? A. pH of 2 B. pH of 7 C. pH of 4 D. pH of 12

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acids & Bases 11.What substance would be dissolve a nail? A. pH of 2 B. pH of 7 C. pH of 6 D. pH of 12 11.What substance would be dissolve a nail? A. pH of 2 B. pH of 7 C. pH of 6 D. pH of 12

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acids & Bases 15.What happens when you react an acid with a base? What are the products? Acids and bases neutralize each other It produces water and a salt Neutralization Video Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Properties of Acids/Bases Acids release positive Hydrogen ions, H + when they dissociate in solution.Acids release positive Hydrogen ions, H + when they dissociate in solution. Acids are called Hydrogen donors.Acids are called Hydrogen donors. Hydrogen will attach to water to make Hydronium ions, H 3 O +.Hydrogen will attach to water to make Hydronium ions, H 3 O +. Bases release negative Hydroxide ions, OH - when they dissociate in solution.Bases release negative Hydroxide ions, OH - when they dissociate in solution. Bases are called Hydrogen acceptors.Bases are called Hydrogen acceptors. Acids and bases will neutralize each other to produce a salt and water.Acids and bases will neutralize each other to produce a salt and water. Acids release positive Hydrogen ions, H + when they dissociate in solution.Acids release positive Hydrogen ions, H + when they dissociate in solution. Acids are called Hydrogen donors.Acids are called Hydrogen donors. Hydrogen will attach to water to make Hydronium ions, H 3 O +.Hydrogen will attach to water to make Hydronium ions, H 3 O +. Bases release negative Hydroxide ions, OH - when they dissociate in solution.Bases release negative Hydroxide ions, OH - when they dissociate in solution. Bases are called Hydrogen acceptors.Bases are called Hydrogen acceptors. Acids and bases will neutralize each other to produce a salt and water.Acids and bases will neutralize each other to produce a salt and water. Acids, Bases & pH Acids, Bases & pH Summers Eve Commercial Summers Eve Commercial

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Acid/Base Strength Strong acids have a pH from 0-2.Strong acids have a pH from 0-2. Weak acids have a pH from 3-6.Weak acids have a pH from 3-6. Water is neutral, with a pH of 7.Water is neutral, with a pH of 7. Weak bases have a pH from 8-11.Weak bases have a pH from 8-11. Strong bases have a pH from 12-14.Strong bases have a pH from 12-14. The center of the scale is weak.The center of the scale is weak. The edges of the scale are strong.The edges of the scale are strong. Strong acids have a pH from 0-2.Strong acids have a pH from 0-2. Weak acids have a pH from 3-6.Weak acids have a pH from 3-6. Water is neutral, with a pH of 7.Water is neutral, with a pH of 7. Weak bases have a pH from 8-11.Weak bases have a pH from 8-11. Strong bases have a pH from 12-14.Strong bases have a pH from 12-14. The center of the scale is weak.The center of the scale is weak. The edges of the scale are strong.The edges of the scale are strong. Play My Acid Base VideoAcid Base Simulator

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com ACID-BASE STRENGTH How are they the same and how are they different in the following ways? The pH paper The light bulb The magnifying glass The graph The equation LAUNCH ACID-BASE SIMULATOR BASES IN ACTIONACIDS IN ACTION

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Properties of STRONG Acids HA (aq) + H 2 O (aq)  H 3 O + + A - ACID = HYDROGEN Donor Acids in Solution VideoPlay My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com STRONG ACIDS pH of 0-2pH of 0-2 Conducts electricity very wellConducts electricity very well Fully dissociates in solutionFully dissociates in solution Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + )Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + ) HA + H 2 O  H 3 O + + A -HA + H 2 O  H 3 O + + A - One way process (single arrow)One way process (single arrow) (aq) means aqueous (water)(aq) means aqueous (water) pH of 0-2pH of 0-2 Conducts electricity very wellConducts electricity very well Fully dissociates in solutionFully dissociates in solution Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + )Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + ) HA + H 2 O  H 3 O + + A -HA + H 2 O  H 3 O + + A - One way process (single arrow)One way process (single arrow) (aq) means aqueous (water)(aq) means aqueous (water) Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com STRONG BASES pH of 12-14pH of 12-14 Conducts electricity very wellConducts electricity very well Fully dissociates in solutionFully dissociates in solution Releases Hydroxide ions (OH - )Releases Hydroxide ions (OH - ) MOH  M + + OH -MOH  M + + OH - One way process (single arrow)One way process (single arrow) (aq) means aqueous (water)(aq) means aqueous (water) pH of 12-14pH of 12-14 Conducts electricity very wellConducts electricity very well Fully dissociates in solutionFully dissociates in solution Releases Hydroxide ions (OH - )Releases Hydroxide ions (OH - ) MOH  M + + OH -MOH  M + + OH - One way process (single arrow)One way process (single arrow) (aq) means aqueous (water)(aq) means aqueous (water) Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com WEAK ACIDS pH of 3-6pH of 3-6 Conducts electricity slightlyConducts electricity slightly Partially dissociates in solutionPartially dissociates in solution Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + )Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + ) HA + H 2 O  H 3 O + + A -HA + H 2 O  H 3 O + + A - Two way process (double arrow)Two way process (double arrow) pH of 3-6pH of 3-6 Conducts electricity slightlyConducts electricity slightly Partially dissociates in solutionPartially dissociates in solution Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + )Donates Hydrogen ions (H + ) to water, producing Hydronium ions (H 3 O + ) HA + H 2 O  H 3 O + + A -HA + H 2 O  H 3 O + + A - Two way process (double arrow)Two way process (double arrow) Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com WEAK BASES pH of 8-11pH of 8-11 Conducts electricity slightlyConducts electricity slightly Partially dissociates in solutionPartially dissociates in solution Releases Hydroxide ions (OH - )Releases Hydroxide ions (OH - ) B + H 2 O  BH + + OH -B + H 2 O  BH + + OH - Two way process (double arrow)Two way process (double arrow) pH of 8-11pH of 8-11 Conducts electricity slightlyConducts electricity slightly Partially dissociates in solutionPartially dissociates in solution Releases Hydroxide ions (OH - )Releases Hydroxide ions (OH - ) B + H 2 O  BH + + OH -B + H 2 O  BH + + OH - Two way process (double arrow)Two way process (double arrow) Play My Acid Base Video

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com ACID-BASE EQUATIONS STRONG ACID: DISSOCIATES HYDROGEN IONS WEAK ACID: HYRDROGEN DONOR WEAK BASE: HYDROGEN ACCEPTOR STRONG BASE: DISSOCIATES HYDROXIDE IONS Acid Base Strengths

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Test Tube Common Name Chemical Name Formula pH Paper Color & Number Cabbage Juice Color & Number Electrical Conductivity Weak/Strong Acid/Base MAKE THIS DATA TABLE

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com ACID BASE LAB For each household chemical: 1.Write down test tube, name and formula. 2.Test with pH paper. Record color/number. 3.Test with Cabbage juice. Record color/number. 4.Determine if acid or base, strong or weak. 5.Test electrical conductivity, weak or strong. STRONG

1 3 5 7 9 11 Lemon Juice Citric Acid H2C6H8O6H2C6H8O6H2C6H8O6H2C6H8O6 WEAK ACID

1 3 5 7 9 11 Baking Soda Sodium Carbonate Na 2 CO 3 WEAK BASE

1 3 5 7 9 11 Sprite Carbonic Acid H 2 CO 3 WEAK ACID

1 3 5 7 9 11 Lye Sodium Hydroxide NaOH STRONG BASE

1 3 5 7 9 11 Wine Malic Acid H2C4H4O5H2C4H4O5H2C4H4O5H2C4H4O5 WEAK ACID

1 3 5 7 9 11 Stomach Acid Hydrochloric Acid HCl STRONG ACID

1 3 5 7 9 11 Laundry Detergent Calcium Hydroxide Ca(OH) 2 STRONG BASE

1 3 5 7 9 11 Vinegar Acetic Acid H2C4H4O5H2C4H4O5H2C4H4O5H2C4H4O5 WEAK ACID

1 3 5 7 9 11 Window Cleaner Ammonia NH 3 WEAK BASE

1 3 5 7 9 11 Drain Cleaner Potassium Hydroxide KOH STRONG BASE

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com ELECTRICAL CONDUCTIVITY Solutions will conduct electricity only if they contain ions (positive and negative particles).Solutions will conduct electricity only if they contain ions (positive and negative particles). Pure water does not conduct electricity because it does not contain ions.Pure water does not conduct electricity because it does not contain ions. Sucrose (sugar) does not conduct electricity because it does not contain ions (covalent molecule).Sucrose (sugar) does not conduct electricity because it does not contain ions (covalent molecule). Salts, acids and bases all conduct electricity because they all release ions in solution.Salts, acids and bases all conduct electricity because they all release ions in solution. Solutions will conduct electricity only if they contain ions (positive and negative particles).Solutions will conduct electricity only if they contain ions (positive and negative particles). Pure water does not conduct electricity because it does not contain ions.Pure water does not conduct electricity because it does not contain ions. Sucrose (sugar) does not conduct electricity because it does not contain ions (covalent molecule).Sucrose (sugar) does not conduct electricity because it does not contain ions (covalent molecule). Salts, acids and bases all conduct electricity because they all release ions in solution.Salts, acids and bases all conduct electricity because they all release ions in solution. SALT/SUGAR SIMULATOR My Acid Base Acid Base Strengths

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Can You Figure it Out? What happens when you react an acid with a base? ACIDBASE H+H+H+H+ Cl - Na + OH - = = ? + ? Na OH H H Cl Neutralization Video Neutralization Video My Acid Base My Acid Base

Copyright 2011 CreativeChemistryLessons.comCreativeChemistryLessons.com Neutralization When an acid and a base react, they neutralize (cancel) each other.When an acid and a base react, they neutralize (cancel) each other. The products are salt and neutral water (pH of 7).The products are salt and neutral water (pH of 7). When an acid and a base react, they neutralize (cancel) each other.When an acid and a base react, they neutralize (cancel) each other. The products are salt and neutral water (pH of 7).The products are salt and neutral water (pH of 7). HCl + NaOH = H 2 O + NaCl ACID BASE Play My Acid Base Video

LESSON SUMMARY  Identify the Main Topic. The topic we learned in chemistry today was __________, which is caused by…  Give an example of the topic. For instance, _____ is a good example of the topic because…  Explain additional details of your example. Furthermore, your example shows the topic because it demonstrates…

Let’s Play Hangman. What’s the Word?  Two kinds of substances that dissociate into ions in solution.  These types of solutions make for very efficient.

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Let’s Play Hangman. What’s the Word?  Two kinds of substances that dissociate into ions in solution.  These types of solutions make for very efficient.

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Presentation on theme: "Let’s Play Hangman. What’s the Word?  Two kinds of substances that dissociate into ions in solution.  These types of solutions make for very efficient."— Presentation transcript:

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