C_Unit_14_Acids-Bases_2010-2011_K

C_Unit_14_Acids-Bases_2010-2011_K - Unit 14 Acids Bases...

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Unit 14: Acids & Unit 14: Acids & Bases Bases Chemistry 1K Cypress Creek High School
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Properties of Acids Properties of Acids Taste sour Feel watery Are electrolytes : conduct an electrical current by forming H + ions in solution React with metals Corrosive pH < 7
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Arrhenius’ Definition of Acids Arrhenius’ Definition of Acids Arrhenius defined acids as anything that produces H+ ions in solution Monoprotic acids – have 1 ionizable hydrogen (HCl) Diprotic acids – have 2 ionizable hydrogens (H 2 SO 4 ) Triprotic acids – you guessed it…they have 3 (H 3 PO 4 ) Produces H + ions in solution
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Bronsted-Lowry Definition of Bronsted-Lowry Definition of Acids Acids According to Bronsted-Lowry an acid is a chemical that is able to lose or "donate" a hydrogen ion (aka proton because the H + contains no electrons or neutrons) during a reaction. Acid loses a hydrogen ion + +
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Naming an Acid Naming an Acid Binary acids (H + nonmetal): hydro ______ic acid Ternary acids (H + polyatomic ion): ate ions: _________ic acid ite ions: _________ous acid Name the following acids: HBr H 2 SO 3 H 3 PO 4 Write the formulas for the following acids: Hydrosulfuric acid Nitrous acid Chromic acid
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Properties of Bases Properties of Bases Taste bitter Feel slippery Corrosive Are electrolytes : conduct an electrical current by forming OH - ions in solution pH > 7
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Arrhenius’ Definition of Bases Arrhenius’ Definition of Bases Arrhenius defined Bases as anything that produces OH - ions in solution Produces OH - ions in solution
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Bronsted-Lowry Definition of Bronsted-Lowry Definition of Bases Bases A chemical species that is able to gain or "accept" a hydrogen ion (aka proton because the H + contains no electrons or neutrons) during a chemical reaction. Base gains a hydrogen ion
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Naming a Base Naming a Base Formula is either: Metal + OH - or Ammonium + OH - Name + hydroxide Name the following bases: NaOH NH 4 OH NH 3 Ca(OH) 2 Write the formulas for the following bases: Magnesium hydroxide
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Conjugates Conjugates Conjugate acid is formed when a base accepts a proton (H + ) Conjugate base is formed when a acid donates a proton (H + )
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Conjugate Acid/Base Pairs Conjugate Acid/Base Pairs Acids and Bases are always reactants Conjugate acids and conjugate bases are always products. Conjugate acid is the product that remains when a base has accepted a proton. Conjugate base is the product that remains when an acid has donated a proton. Ex NH 3 + H 2 O → NH 4 + + OH - (base) (acid) (c.acid) (c.base)
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• NH 3 (g) + H 3 O + (aq) NH 4 + (aq) + H 2 O(l) • CH 3 OH(l) + NH 2 - (aq) CH 3 O - (aq) + NH 3 (g) OH - (aq) + H 3 O + (aq) H 2 O(l) + H 2 O(l) • NH 2 - (aq) + H 2 O(l) NH 3 (g) + OH - (aq) Conjugate Practice Conjugate Practice Base Acid C.Acid C.Base Acid Base C.Base C.Acid Base Acid C.Acid C.Base Base Acid C.Acid C.Base
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C_Unit_14_Acids-Bases_2010-2011_K - Unit 14 Acids Bases...

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