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lab 4 formal.docx

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Department
Chemistry
Course
CHM1311
Professor
A L L
Semester
Spring

Description
ObservationsTable 1 Initial ConditionsSolution 1Solution 2Solution 3EDTA volume5000 mL5000 mL5000 mLpH404550Drops of Cr3 Added765Temperature198 C198 C198CInitial Time305307309Table 2Transmittance of Solutions According to TimeSolution 1 pH 40Solution 2 pH 45Solution 3 pH 50Time min Time min Time min TransmittanceTransmittanceTransmittance58057655610801072103815791566153220722060202825752555252530733050302335354635722140704042402245674539545215064503650215563553455216060603160206569653065207057702870195755575265751958053580258019585528524585199051912390199537595229519100100211004819After 10 minutes of heating and cooling2319Solution one observations Started with almost no colour with time it progressively turned into a light purple Turned into a darker purple after heatingSolution two observations Started with a very light purple colour with time it progressively turned into a darker purple Turned into a darker purple after it was heatedSolution three observations Started with a dark purple and progressively got darker Turned a darker purple after heating
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