Chemistry Lab 152

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Name: ID Number: Section: Lab Partner: C Chem 152 Experiment #1: Weak Acid Titrations By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration will result in 5 points being deducted from your report score. Signature: Note: All sections of this report must be typed Total Points = 60 pts (5 pts notebook, 55 pts template) Notebook Pages: Your notebook pages will be graded for general organization and completeness (Can your TA easily find and read the data he/she is looking for?) PURPOSE AND METHOD Clearly state the purpose of this lab. Explain how this is accomplished in this experiment. What calculations do you need to perform? What measurements will be made? [Do not provide experimental details here]. How do you go from calculated/measured values to accomplishing stated purpose? (4 pts) The purpose of this lab is to determine the exact concentration of an unknown acetic acid solution. Titrations for two different reactions will be performed. Controlled volumes of one reagent are added to a flask containing the other reagent until the equivalence point of the reaction is reached, one between sodium hydroxide (NaOH) and potassium hydrogen phthalate (KHP) and the other between NaOH and acetic acid (CH3COOH). NaOH (aq) + KHP (aq) —› Na+ (aq) + K + (aq) + P2- (aq) + H2O (l) NaOH (aq) + CH3COOH (aq) —› Na+ (aq) + CH3COO- (aq) + H2O (l) The titration of NaOH with KHP will identify the concentration of the NaOH provided. KHP will be weighed and its mass will be recorded. The moles of KHP will be calculated: Moles KHP = Mass KHP recorded / Molar mass of KHP = Mass of KHP recorded / 204.22g/mol The volume of NaOH will be determined by reading the
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