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화학

화학량론. 14.42 mL of 0.008332 M KIO3 + C6H8O6

by 영원파란 2019. 4. 2.

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화학량론. 14.42 mL of 0.008332 M KIO3 + C6H8O6

 

 

An unknown sample of ascorbic acid was titrated with 14.42 mL of 0.008332 M KIO3. Calculate the amount of ascorbic acid (in milligrams) in the unknown sample.

 

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14.42 mL of 0.008332 M KIO3에 들어있는 KIO3의 몰수

= (0.008332 mol/L) × 0.01442 L = 0.000120147 mol KIO3

( 참고 https://ywpop.tistory.com/7787 )

 

 

균형 맞춘 반응식

KIO3 + 3C6H8O6 3C6H6O6 + KI + 3H2O

( 3HC6H7O6 + KIO3 3C6H6O6 + KI + 3H2O )

( The mol : mol relationship of ascorbic acid to potassium iodate is 3 : 1, so that three moles of ascorbic acid are oxidized by one mole of potassium iodate. )

 

 

KIO3 : C6H8O6 = 1 : 3 계수비(= 몰수비) 이므로,

( 참고 https://ywpop.tistory.com/7894 )

0.000120147 mol KIO3와 반응하는 C6H8O6의 몰수를 계산하면,

KIO3 : C6H8O6 = 1 : 3 = 0.000120147 mol : ? mol

? = 3 × 0.000120147 = 0.000360441 mol C6H8O6

 

 

C6H8O6의 몰질량 = 176.12 g/mol 이므로,

0.000360441 mol C6H8O6의 질량을 계산하면,

0.000360441 mol × (176.12 g/mol) = 0.06348 g C6H8O6

( 참고 https://ywpop.tistory.com/7738 )

 

 

: 63.48 mg

 

 

 

[키워드] 비타민 C 정량 기준문서, C6H8O6 + KIO3

 

 

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