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L19 - Reactions between strong acids and bases Lecture 19...

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Lecture 19 Neutral Territory: Acid-Base Reactions Key Idea: Acids react with bases such that the products are relatively weaker acids or bases or neutral. Reactions between strong acids and bases HCl (aq) + NaOH (aq) ! NaCl (aq) + H 2 O (l) HNO 3 (aq) + NaOH (aq) ! NaNO 3 (aq) + H 2 O (l) Ca(OH) 2 (s) + 2 HCl (aq) ! CaCl 2 (aq) + H 2 O (l) HNO 3 (aq) + HCl (aq) ! no reaction Ca(OH) 2 (s) + NaOH (aq) ! no reaction Acid plus bases gives salt plus water. Net ionic equation: H 3 O + + OH - ! 2 H 2 O Predict the products. For a stoichiometric reaction, what is the pH of the resulting solution? Reactions between weak and strong Predict the products. CH 3 COOH (aq) + OH - (aq) ! NH 4 + (aq) + OH - (aq) ! F - (aq) + H 3 O + (aq) ! HCO 3 - (s) + H 3 O + (aq) ! You have used titrations in lab to determine the amount of acid in a solution. What happens in the titration solution? How does the [H 3 O + ] and pH change during the titration ? Titration Demo: Strong Acid + Strong Base Titration: Strong acid with strong base 0 50 100 150 200 mL 0.100 M NaOH added 0.0025 0.0050 0.0100 0.0075 0 Moles present at equilibrium H 3 O + OH - Cl - Reaction of 100 mL of 0.100 M HCl with 0.100 M NaOH

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L19 - Reactions between strong acids and bases Lecture 19...

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