Vitamin C Is a Monoprotic Weak Acid,which Is Also Called

question 58

Multiple Choice

Vitamin C is a monoprotic weak acid,which is also called ascorbic acid (C₆H₈O₅,176 g/mol) .A vitamin C tablet weighing 0.75 g was dissolved in 50.0 mL of water and titrated with 0.250 M sodium hydroxide.It took 12.5 mL of the NaOH solution to reach the end point.What is the percentage of vitamin C in the tablet? Only the vitamin C reacted with the NaOH.

• A)98.7%
• B)64.2%
• C)87.7%
• D)95.5%
• E)73.3%

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The release of CO2 into the atmosphere, mainly from burning fossil fuels, leading to climate change.

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