What is the nature of samples that should NOTbe placed inside the drying-oven? A. Potential Oxidant B. Potential Reductant C. Acids D. Bases 27. In measuring the volume of a liquid which apparatus will give you the most precise measurement up to two decimals places of empirical data? A. Volumetric Flask B. Graduated Cylinder C. Burette D. Pipette 28. In an experiment that aims to determine the acid strength of a sample by back titration, what is the indication that the endpoint has been reached?
26. What is the nature of samples that should NOTbe placed inside the drying-oven?
A. Potential Oxidant
B. Potential Reductant
C. Acids
D. Bases
27. In measuring the volume of a liquid which apparatus will give you the most precise measurement up to two decimals places of empirical data?
A. Volumetric Flask
B. Graduated Cylinder
C. Burette
D. Pipette
28. In an experiment that aims to determine the acid strength of a sample by back titration, what is the indication that the endpoint has been reached?
A. The burette volume is set to zero
B. The resulting solution changes color
C. The resulting solution gains a lingering dominant pink color
D. The Burette needs to be refilled by the titrant base
29. After heating the sample in a drying oven for 45 minutes, the samples in a crucible should be placed into another apparatus to allow slow cooling to avoid weighing errors, what do we call thisapparatus?
A. Drying pan
B. Centrifuge
C. Analytical Balance
D. Desiccator
30. Describe how you would prepare a 800-mL of a 0.57 M Pb2+from solid Pb3(PO4)2.
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