You ground your vitamin C tablet and dissolved it in 250. mL of water in a...

You ground your vitamin C tablet and dissolved it in 250. mL of water in a volumetric flask. You used a 25.0 mL aliquot of this solution for your titration. If it takes 11.50 milliliters of your 0.0151M titrant, how many milligrams of ascorbic acid (MW 176.12) were in the original tablet?

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Expert Solution

no of moles of titrant = molarity * volume in L

= 0.0151*0.0115 = 0.00017365 moles

25ml of aliquot solution contains = 0.00017365 moles of ascorbic acid

250ml of solution contains = 0.00017365*250/25 = 0.0017365 moles

mass of ascorbic acid = no of moles*gram molecular

= 0.0017365*176.12 = 0.306g in tablet

= 306mg of ascorbic acid

queen_honey_blossom answered 1 year ago

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