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March 29, 2017

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Ascorbic acid (vitamin C) is a diprotic acid having the formula H2C6H6O6. A sample of a vitamin supplement was analyzed by titrating a 0.2894 g sample dissolved in water with 0.0215 M NaOH. A volume of 10.83 mL of the base was required to completely neutralize the ascorbic acid. What was the percentage by mass of ascorbic acid in the sample?

______________% ascorbic acid

  • NEED HELP WITH CHEMISTRY HW - ,

    1. Write the equation and balance it.
    2. moles NaOH = M x L = ?
    3. Using the coefficients in the balanced equation, convert moles NaOH to moles ascorbic acid.
    4. moles asc acid x molar mass asc acid = grams ascorbic acid.
    5. %ascorbic acid = (grams ascorbic acid/mass sample)*100 = ?

  • NEED HELP WITH CHEMISTRY HW - ,

    Suppose 15.0 mL of 0.315 M NH4Cl is combined with 10.0 mL of 0.430 M (NH4)3PO4. Assume the volumes are additive, and no chemical reaction takes place. What is the total cocentration of ammonium ions in this mixture?

  • NEED HELP WITH CHEMISTRY HW - ,

    9.33 * 10^22 ions NH4

  • NEED HELP WITH french HW - ,

    la

  • NEED HELP WITH CHEMISTRY HW - ,

    4M

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