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# Aim: to determine the concentration of sodium hydroxide by titration potassium hydrogen phthalate

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Introduction

DCP LAB: ACID-BASE TITRATION Aim: to determine the concentration of sodium hydroxide by titration potassium hydrogen phthalate Raw Data Amount of Sodium Hydroxide to Titrate Potassium Hydrogen Phthalate Trial Amouunt of NaOH (�0.05ml) 1 24.60 2 25.20 3 25.00 Processed Data Uncertainties: Electronic Balance : � 0.01g Pipette : 25 � 0.05ml Burette : 50 � 0.05ml Amount of KHC8H4O4 used : 2.00 � 0.01 g Molar mass of KHC8H4O4 : 202.40 g/mol No of moles in KHC8H4O4: (2.00/202.40) ...read more.

Middle

1 0.00988/0.0246 = 0.402 mol dm-3 2 0.00988/0.0252 = 0.392 mol dm-3 3 0.00988/0.0250 = 0.395 mol dm-3 Propagation of Error Percentage error in mass of KHC8H4O4: (0.01/2.00) x 100% = 0.500% Percentage error in volume of NaOH in multiple trials Trial Percentage error in volume of NaOH 1 (0.05/24.60) x 100% = 0.203% 2 (0.05/25.20) ...read more.

Conclusion

2 Concentration: 0.00988/0.0252 = 0.392 mol dm-3 Percentage Error: 0.5% + 0.198% = 0.698% Concentration of NaOH: 0.392 � 0.698% 0.392 x 0.698% = 0.00274 0.392 � 0.003 mol dm-3 3 Concentration: 0.00988/0.0250 = 0.395 mol dm-3 Percentage Error: 0.5% + 0.200% = 0.700% Concentration of NaOH: 0.395 � 0.700% 0.395 x 0.700% = 0.00277 0.395 � 0.003 mol dm-3 ?? ?? ?? ?? Andita Syabana IB Chemistry February 1, 2012 ...read more.

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