**Report Sheet: Experiment 15** **Titration of Acids and Bases** **A. Standardization of Sodium Hydroxide (NaOH) Solution** | | Trial 1 | Trial 2 | Trial 3 | |---------------------|-----------|-----------|-----------| | Mass of KHP | 0.4923 g | 0.4570 g | 0.4360 g | | Mass of KHP used | 0.4923 g | 0.4570 g | 0.4360 g | | Final buret reading | 21 mL | 40.5 mL | 41.7 mL | | Initial buret reading | 0 mL | 21 mL | 24.1 mL | | mL of NaOH used | 21 mL | 19.5 mL | 17.6 mL | | Molarity of NaOH | 0.1149 | 0.1095 | 0.1213 | Average molarity: **0.1152** Standard deviation: (not provided) _Show your calculations for molarity and standard deviation_ (hand calculations and formulae appear on the sheet) **B. Analysis of an Unknown Acid** | | Trial 1 | Trial 2 | Trial 3 | |---------------------|-----------|-----------|-----------| | Mass of unknown | 0.6109 g | 0.5296 g | 0.5708 g | | Mass of unknown used| 0.6109 g | 0.5298 g | 0.5708 g | | Final buret reading | 14.4 mL | 37.7 mL | 39.4 mL | | Initial buret reading | 0 mL | 26 mL | 26.5 mL | | mL of NaOH used | 14.4 mL | 11.7 mL | 12.9 mL | | Mass of KHP in unknown | | | | | Percent of KHP in unknown | | | | _M\(_1\)V

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