Presentation on theme: "Neutralization Reaction"— Presentation transcript:
1 Neutralization Reaction Base and acid react to produce a salt and water
2 TitrationA lab technique where a neutralization reaction is preformed to determine the concentration of an unknown.
3 The anatomy of a titration: Standard solution - solution of known concentration.End Point - the point at which neutralization is achievedIndicator - chemical that changescolor with a change in pH.We will be using phenolphthalein.Clear in an acid pink in a baseYou want a light pinkBuret - Measurement device
5 Titration Calculations 4 steps Start with the balanced equationFind the moles in the standard solutionSet up ratio to find moles of unknownFind molarity(mol/L) or volume
6 Titration Calculations example problem A ml solution of H2SO4 is neutralized by ml of 1.0 M NaOH. What is the concentration of H2SO4?H2SO NaOH --> Na2SO H2OL NaOH 1.0 mol NaOH 1 mol H2SO41 L NaOH mol NaOH L H2SO4= 0.35 mol/L H2SO4
7 Titration Problems your turn What is the molarity of phosphoric acid if 15.0 mL of the solution is neutralized by 8.5 mL of 0.15 M NaOH?H3PO NaOH --> Na3PO H2OL NaOH mol NaOH 1 mol H3PO41 L NaOH mol NaOH L H3PO4= mol/L H3PO4
8 Titration Problems 1 more your turn How many milliliters of 0.45 M hydrochloric acid must be added to 25.0 mL of 0.15 M NaOH?HCl + NaOH --> NaCl + H2OL NaOH mol NaOH 1 mol HCl L HCl mL1 L NaOH mol NaOH mol HCl 1L= 8.3 mL HCl