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?

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 2 years ago

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