(A) If you need exactly 0.493 moles of DCP to react completely with the ascorbic
ID: 889928 • Letter: #
Question
(A) If you need exactly 0.493 moles of DCP to react completely with the ascorbic acid in a sample, how manygrams of ascorbic acid are there in the sample?
(B) If the DCP solution is 0.01393M, how many moles of DCP are there in 24.02 mLs of this solution? Do not write the answer in scientific notation. Make sure you use the correct number of significant figures and the correct units.
(C) If the DCP solution is 0.01278M and you need 23.93 mLs of the DCP solution to completely react with the ascorbic acid, how many grams of ascorbic acid are in your sample? Do not write the answer in scientific notation. Make sure you use the correct number of significant figures and the correct units.
Explanation / Answer
(A) If you need exactly 0.493 moles of DCP to react completely with the ascorbic acid in a sample, how manygrams of ascorbic acid are there in the sample?
n = 0.493 molDCP to react ascorbic acid
1 mol of DCP is needed to react with 1 mol of Ascorbic acid therefore
0.493 mol of DCPis needed to react 0.493 mol of Ascorbic acid.
MW of Ascorbic acid = 176.12 g/gmol
m = n*MW = 0.493 *176.12 = 86.9 g of Ascorbic acid
NOTE we are not allowed to answer to multiple questions, consider posting Question B and C i n another set of questions
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