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Acid and Bases. Chapter 10. Essential Questions. How are acids and bases defined and classified? How do we classify a solution as a acidic, basic or neutral solution? What is pH and what does it describe? How does acid rain occur?. Acids and Bases. - PowerPoint PPT Presentation
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Essential QuestionsHow are acids and bases defined and classified?
How do we classify a solution as a acidic, basic or neutral solution?
What is pH and what does it describe?
How does acid rain occur?
Acids and BasesAcid is from acidus which means “_________”
Bases taste ________and are _____________.
Bases are considered ____________which is from the Arabic word for _____________
Definition of Acid/BaseAcid is any chemical that _____________a
hydrogen ion.
Bases is any chemical that ____________a hydrogen ion.
Products of Acid/Base Reaction
Products of an acid-base reaction behave as ________or ____________.
An ammonium ion may ____________a hydrogen ion back to a hydroxide ion to _____________the original reactants.
Water ReactionWater can act as a ____________, donating a
hydrogen to another ___________ molecule
Produces ____________ion and a _____________ion
The reverse reaction has hydronium ____________a hydrogen atom to the hydroxide ion to form __________
What is pH?The negative of the ________________of the
hydronium ion concentration.
pH = -log[______]
Acidic, Basic and Neutral Solutions
Acidic solutions have more ________________ions than _____________ions.
Basic solutions have less _______________ions than ________________ions.
Neutral solutions have equal numbers or ______________and _________________ions.
pHNotice the scale has the highest concentration
of hydronium ions at pH = -________with pH is the lowest at pH = ____________
High pH number means a very ___________solution.
Low pH number means a very ____________solution.
pH = 7 is a ____________solution
Product of Acid/Base Reaction
A salt is any ionic compound formed between a reaction of ______________________Examples of salt: KNO3, CaCl2, NaF
Acid-base reactions are a neutralization reactionPositive ion of salt comes from the ____________Negative ion of salt comes from the ___________
Water is usually in the product of a ________________reaction
Strength or Acids/BasesStrong acids easily donate ____________to water.
Very little of the original acid is ________________.
Weak acids have a less tendency to donate ____________ions to water.Much of the _______________is found in the water.
Bases behave the ______________. Strong bases readily _____________hydrogen ions.
Acid RainRainwater is acidic because of the presence of
CO2
CO2 comes _______________________________
CO2 + H2O H2CO3 (carbonic acid)
Carbonic acid _______________the pH of rainwater to __________
Acid rain occurs by presence of pollutants like SO2 (sulfur dioxide) from _____________________
2 SO2 + O2 2 SO3
SO3 + H2O H2SO4
Acid rain is the term for rain with a pH ____________
Lakes Sensitive to Acid Rain
• Rocks which contain ____________contain bases. Rocks which contain ___________contain very little bases.
• Red area = lakes __________to acid because the rocks are mostly ___________.
Ocean vs. Fresh Water pHFresh water ______________and ______________CO2
pH is below 7 for freshwater lakes
Oceans _____________and _______________CO2
Considered a carbon dioxide ______________pH is approximately __________________
Greenhouse EffectOceans cannot _____________enough
___________to stop greenhouse effect
CO2 traps ____________ radiation which ____________up the surface of the Earth
pH of rain, ______________________and pH of oceans are interconnected
Buffer SolutionsBuffer solutions __________________changes in
pH
Need a __________acid and ___________of a weak acid
The strong acid _____________with the salt of a weak acid to produce a _____________and a _________
Buffer Solution with a Strong Base
A strong base interacts with the weak acid to produce a _________and _____________
pH does change in buffer solutionsA strong base would _____________slightly the pHA strong acid would _____________the pH slightly
Blood Buffer SolutionContains both _______________ acid and sodium
___________________
Carbonic acid ________________when you hold your breath or ____________the level of CO2 in your bloodstream
Hyperventilation causes CO2 to ____________your bloodstream and _________________sodium bicarbonate.