Pure Ascorbic Acid Vitamin C C6h O6 Comes In The Form Of White Powder In This Practical A Standard Solution Of Vitam 1 (44.2 KiB) Viewed 12 times
Pure ascorbic acid (Vitamin C, C6H₂O6) comes in the form of white powder. In this practical a standard solution of Vitamin C with concentration of 0.005mol/L has been prepared for you. In the future you may need to prepare this standard solution yourself. This question and the following relate to preparation of 250 mL standard solution. In order to prepare this solution you will need to calculate what mass of ascorbic acid to weigh into a 250mL volumetric flask, before filling to the aliquot line with water. Which two equations below must be used? (Hint: what information do you have and what are you trying to calculate? Remember that as long as you have its formula you can determine the molar mass, M, of any compound using the Periodic Table.) n = m/M On=c/V n = cxV n = mxc n = mxM
lodine solution: has not been classified as "harmful by ingestion" True False
If you accidentally get iodine solution in your eye during the experiment, what course of action should you immediately follow? O No action required. Wash with fresh running water Seek medical attention immediately. Press a damp towel over the affected area.
How should your demonstrator deal with a spill of iodine solution, 12? Mop spill area with water. React with an acid and then wash area with water. Mop area with a non-polar solvent such as hexane. Use a mercury spill-kit to contain the spill.
Using the following atomic masses, calculate the molar mass (M) for ascorbic acic (Vitmain C - C6H₂O6) to two decimal places: (Note: only the number in digits is required, no units) Element Atomic mass (g/mol) carbon 12.01 oxygen 16.00 hydrogen 1.01 helium 4.00 nitrogen 14.01 calcium 40.08
What instrument would you use to deliver accurately a 25.00 mL aliquot of solution to a flask? burette volumetric flask scales pipette
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