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Unknown Weak Acid Lab Report

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The purpose of experiment ten was to collect data on an unknown weak acid by watching and measuring the weak acid being neutralized. This was done by using a Vernier Probe and using the data to figure out the identity of the unknown acid. A weak acid will have a strong conjugate base. The pKa of a weak acid can be taken from the – log (ka) or by using pH. To find the pKa using the graph of the pH in the experiment the equivalence point was found and ½ of this point is the pKa of the unknown weak acid. To determine the molar mass of the unknown acid the moles of base has to be determined along with the mass of the acid (Westfield, n.a). The equivalence point needed to determine the pKa is the point of the titration curve where the pH begins
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