CHM 1311 Study Guide - Umber, Phenolphthalein, Tums
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If any of the above information is unclear or not provided, your grade will not be recorded! Checklist: attached attached: raw data sheet written in pen, signed by ta and, report form completed in pen (or typed) and. Average concentration of stock solution of naoh (m) Determination of the concentration of an unknown diprotic acid. The naoh solution (before and after dilution), the hcl solution, the acid #5 solution and the juice #5 solution were all clear, colourless and had little to no odour. The phenolphthalein was clear but had a fairly strong smell similar to that of alcohols such as ethanol. When phenolphthalein was added to the erlenmeyer flasks containing any of the various acids, the solution remained clear. However, as drops of naoh were added to the flask, the solution would temporarily turn light pink, and would become clear again once the solution was swirled.
