Explore BrainMass

Explore BrainMass

    the mass of H2C2O4 acid in a solid sample

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Oxalic acid H2C2O4 is a diprotic acid. Calculate the mass of acid in a solid given that a 0.7984 g sample of that solid required 45.00 mL of 0.300 M NaOH for neutralization.

    © BrainMass Inc. brainmass.com December 24, 2021, 7:34 pm ad1c9bdddf
    https://brainmass.com/chemistry/acids-and-bases/mass-acid-solid-sample-199794

    SOLUTION This solution is FREE courtesy of BrainMass!

    Please see the attached file for detailed solution.

    neutralization reaction
    oxalic acid H2C2O4 is a diprotic acid. calculate the mass of acid in a solid given that a 0.7984 g sample of that solid required 45.00 mL of 0.300 M NaOH for neutralization.

    1 mol of H2C2O4 can provide 2 moles of H+ in the neutralization since it is a diprotic acid.

    For NaOH, 1 mole of NaOH only provide 1 mol of OH-.

    H+ + OH-  H2O
    In the above reaction, 1 mole of H+ reacts with 1mol of OH .
    Therefore, in the neutralization, 1 mol of H2C2O4 will react with 2 mol of NaOH.
    That is, the moles of NaOH is twice that of H2C2O4 in the reaction.

    The moles of NaOH used is
    (45.00 mL) * (0.300 M) = (0.0450 L) * (0.300 M) = 0.0135 mol.

    Then it requires (0.0135 mol) / 2 = 0.00675 mol of H2C2O4 in neutralization.

    The molar mass of H2C2O4 is 2 *1 + 2* 12 + 4* 16 = 90 g/mol
    So the mass of 0.00675 mol of H2C2O4 is
    (90 g/mol) * (0.00675 mol) = 0.6075 grams.

    There are 0.6075 g of oxalic acid in the solid.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 7:34 pm ad1c9bdddf>
    https://brainmass.com/chemistry/acids-and-bases/mass-acid-solid-sample-199794

    Attachments

    ADVERTISEMENT