chem 2 lab for izzy 18 .docx - The first purpose of this experiment was to operate a pH meter and to graphically determine a stoichiometric point The

chem 2 lab for izzy 18 .docx - The first purpose of this...

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The first purpose of this experiment was to operate a pH meter and to graphically determine a stoichiometric point. The second purpose was to determine the molar concentration of a weak acid solution labeled “Bentley”. The third purpose was to determine the molar mass of a solid weak acid labelled “Lambo”. The final purpose was to determine the pK a of a weak acid. this experiment focused on the molar concentration of an unknown weak acid solution labeled “Bentley”. For this part of the experiment 50mL of NaOH was placed on the buret, and in the conical flask it contained the weak acid “Bentley”
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Unformatted text preview: . The molar concentration for the first part of the experiment was calculated to be 0.136 mol/L for trials 1 and 2. The average molar concentration of the acid was calculated to be 0.136 mol/L. Part B of this experiment was done in order to find the molar mass and the pK a of a weak solid acid labelled “Lambo”. The molar mass of the acid was calculated to be 227.80 g/mol for trial 1 and 197.69 g/mol. The average molar mass of acid was calculated to be 212.75 g/mol. The pK a for trial 1 was calculated to be 4.7 and 4.4 for trial 2. The average pK a was calculated to be 4.55....
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