chem 1212 week 3 lab 4.pdf - Predicting the Equivalence...

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Predicting the Equivalence Point 2 Titrations provide a method of quantitatively measuring the concentration of an unknown solution. In an acid-base titration, this is done by delivering a titrant of known concentration into an analyte of known volume. To make a titration more efficient and more accurate, it is often important to be able to predict the equivalence point for the titration. In this assignment, you will be given 0.1276 M HCl and 0.1475 M NaOH, you will predict the equivalence point, and then perform the titration to check your prediction. 1. Start Virtual ChemLab, select Acid-Base Chemistry, and then select Predicting the Equivalence Point (2) from the list of assignments. The lab will open in the Titrations laboratory. 2. Click the Lab Book to open it. Click the Buret Zoom View window to bring it to the front. The buret is filled with 0.1475 M NaOH. The beaker contains 25.00 mL of 0.1276 M HCl. The pH meter is turned on and has been calibrated. The indicator is bromocresol green. 3. Predict what volume (mL) of 0.1475 M NaOH is required to titrate the 25.00 mL of 0.1276 M HCl to the equivalence point. Show your work and enter your answer in blank to receive full credit. mL 4. Perform the titration. Click the Save

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