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Ch. 15 – 4 What is titration? p. 571-578

Ch. 15 – 4 What is titration? p. 571-578. standard solution. unknown solution. Titration. Titration Analytical method in which a standard solution is used to determine the concentration of an unknown solution. Titration. Equivalence point (endpoint)

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Ch. 15 – 4 What is titration? p. 571-578

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  1. Ch. 15 – 4 What is titration? p. 571-578

  2. standard solution unknown solution Titration • Titration • Analytical method in which a standard solution is used to determine the concentration of an unknown solution.

  3. Titration • Equivalence point (endpoint) • Point at which equal amounts of H3O+ and OH- have been added. • Determined by… • indicator color change • dramatic change in pH

  4. Titration moles H3O+ = moles OH- MVn = MVn M: Molarity V: volume n: # moles of H+ ions in the acid or # moles ofOH- ions in the base

  5. Titration • 42.5 mL of 1.3M KOH are required to neutralize 50.0 mL of H2SO4. Find the molarity of H2SO4. H3O+ M = ? V = 50.0 mL n = 2 OH- M = 1.3M V = 42.5 mL n = 1 MVn = MVn M(50.0mL)(2) =(1.3M)(42.5mL)(1) M = 0.55M H2SO4

  6. Learning Check Write a balanced equation and calculate the mL of 2.00 M H2SO4 required to neutralize 50.0 mL of 1.00 M KOH? __H2SO4 + __KOH __K2SO4 + __ H2O 12.5 mL 2) 50.0 mL 3) 200. mL Answer: 12.5 mL

  7. Learning Check A 25 mL sample of phosphoric acid is neutralized by 40. mL of 1.5 M NaOH. What is the molarity of the phosphoric acid solution? 3NaOH + H3PO4 Na3PO4 + 3H2O 1) 0.45 M 2) 0.80 M 3) 7.2 M Answer : 2) 0.80 M

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