Liquid Vitamin C, (ascorbic acid) C6H806, readily reacts with atmospheric oxygen

ID: 871540 • Letter: L

Question

Liquid Vitamin C, (ascorbic acid) C6H806, readily reacts with atmospheric oxygen, O2, to form liquid dehydroascorbic acid, C6H6O6 and water

A: explain why this is a chemical reaction

B: Write a balanced equation for this reaction

C: How many mole of oxygen gas is required to react with 1000.00 mg of Vitamin C

D:Would 1.00g of oxygen be enough to completly react with the 1000.00 mg of Vitamin C, explain your answer by determining the limiting reagent

E: What is the theoretical yield of dehydroascorbic acid for the reaction of 1000.00 mg of Vitamin C with 1.00g of oxygen

A) it is oxidation - reduction reaction . two H atoms are lost by Vitamic C . that means it is reduced .

ascorbic acid reduced form is dehydroascorbic acid. so this is chemical reaction

B) C6H8O6 + 1/2O2 ---------------------> C6H6O6 + H2O

C) 1 mole Vitamin C = 1/2 mole O2

2 mole Vitamin C = 1 mole O2

2 x 176 g = 1 mole O2

352g Vitamin C = 1 mole O2

1000 x10^-3 g = x ??

moles of Oxygen required = x = 2.84 x 10^-3

D) 352g Vitamin C = 1 mole O2

352g Vitamin C = 32 g O2

? y = 1 g O2

y = 352/32= 11

y = vitamine C = 11g

Vitamine C= 11000mg

so for 1 g of O2 11000g Vitamine C required .

E) C6H8O6 + 1/2O2 ---------------------> C6H6O6 + H2O

176 x 10^3 g -----------------------> 174 x 10^3

11000mg---------------------------> ?

yield = 174 x 10^3 x 11000/176 x 10^3

= 10875

theoretical yield =10875mg

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