Titrations

Titrations Gradual addition of one solution to another to determine concentration of acid or base Neutralization reaction Acid + Base→ H2O + salt Use standard solution in titration Standardized by titrating with known amount of reactant

Preforming Titration Use burets to deliver known amount of standard solution to unknown solution Indicator is chosen to show ∆ pH Reaction is complete at the equivalence point Point where acid has neutralized base End point is where color change occurs Indicator should be chosen well so equivalence point = endpoint

M1V1=M2V2 A student titrates 40.00 mL HCl sol’n of unknown concentration with 24.64 mL of 0.5500 M NaOH to reach the equivalence point. What is the concentration of the HCl sol’n in moles/L (M)?

If 29. 5mL of 0. 150 M HCl neutralizes 25. 0 mL basic sol’n If 29.5mL of 0.150 M HCl neutralizes 25.0 mL basic sol’n. What is the [OH-]?