PART 2: MICROTITRATION OF ASCORBIC ACID IN A VITMAIN C TABLET
Purpose and Theory: A tablet of vitamin C contains the active ingredient called ascorbic acid (HC,H,0.).
Ascorbic acid is an organic acid which is a white power and is soluble in water.
In the following microtitration lab you will be grinding up a vitamin C tablet
, and using a 0.10 g sample of the
vitamin C powder, which will be dissolved in 20-40 mL of water. This solution will be used to determine the
quantity of ascorbic acid in a commercial vitamin C tablet.
Groups
Lab 2
# of Drops 1 or Drops 2 of Drops 3
96
91
94
Hadia
Data & Analysis:
Complete the missing information in the following data table [24]
1
2
3
Trial
Volume of NaOH (drops)
0 05mL drop
(NaOH (O 0050mol/L)
Volume of NaOH (ML)
Average Volume of NaOH (ml)
T I
O 0050
00050
00050
The balanced chemical reaction between ascorbic acid and sodium hydroxide is:
HC,H,O + NaOH NaC,H,Oye H,O,
1. Stoichiometrically calculate the mass (in grams) of ascorbic acid in the powdered sample. (37)
Answers
Answer:
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Answer:
Take this vitamin by mouth with or without food, usually 1 to 2 times daily. Follow all directions on the product package, or take as directed by your doctor.
If you are taking the extended-release capsules, swallow them whole. Do not crush or chew extended-release capsules or tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split extended-release tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing. Take this product with a full glass of water (8 ounces/240 milliliters) unless your doctor directs you otherwise.
If you are taking the wafers or chewable tablets, chew them thoroughly and then swallow. If you are taking the lozenges, place the lozenge in your mouth and allow it to slowly dissolve.
If you are taking the powder, mix it thoroughly in the proper amount of liquid or soft food and stir well. Take all of the mixture right away. Do not prepare a supply for future use. If you are using the liquid form of this vitamin, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.
Dosage is based on your medical condition and response to treatment.
Use this vitamin regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.
If you think you may have a serious medical problem, seek immediate medical attention.