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2. 13mg of vitamin c was detected in a test . 200mg of ground tablets were used in the preparation. if the weight of one tablet is 780mg, and serving is 2 tablets what is the amount of vitamin c present in the sample in units mg/serving?
3. how many microliters of a 50mg/ml solution would you need to use to make 10ml of a 0.5mg/ml solution?
(Hint: Structures, ions..)
The community is at an elevation of 250 feet above sea level - you can assume atmospheric pressure = 1 atm
The metal of concern is cadmium (not lead)
The pH is to be raised to 9.0.
Using the correct graph (handouts or Lecture 6) describing the carbonate system, graphically determine the carbonate concentration at a pH of 9 (at sea level, [H2CO3] = 10-4.87M)
Will cadmium (II) carbonate or cadmium (II) hydroxide precipitate first? Compute the cadmium concentrations at equilibrium for both compounds at the given pH, graphically determined [CO3-2] to support your answer.
the help of examples.
b) Discuss the effect of substituents on the colour associated with organic dyes.