Chemistry

A 5.00 mL sample of an aqueous solution of H3PO4 requires 43.2mL of 0.285M NaOH to convert all of the H3PO4 to Na2HPO4. The other product of the reaction is water.
Calculate the molarity of the H3PO4 solution.

  1. 👍 0
  2. 👎 0
  3. 👁 182
asked by Duke
  1. H3PO4 + NaOH ==> NaH2PO4 + H2O
    mols NaOH = M x L = ?
    1 mol NaOH = 1 mol H3PO4
    M H3PO4 = mols H3PO4/L H3PO4.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    A 27.00 mL sample of an unknown H3PO4 solution is titrated with a 0.110 M NaOH solution. The equivalence point is reached when 25.78 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The

    asked by Amanda on September 27, 2012
  2. Chemistry

    A 0.1mol/dm^3 aqueous solution of phosphoric (V) acid, H3PO4, is mixed with a 0.1 mol/dm^3 of aqueous solution of sodium hydroxide. Which mixture will form the salt Na3PO4? a) 10cm^3 of H3PO4 with 30cm^3 of NaOH b) 10cm^3 of H3PO4

    asked by Marrion on October 9, 2009
  3. Chemistry

    A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)

    asked by April on July 23, 2014
  4. chemistry

    If 33.0 mL of 0.002 M aqueous H3PO4 is required to neutralize 28.0 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution.

    asked by Anonymous on April 22, 2012
  5. Chem

    Please tell me if these are right! 1.How many milliliters of 0.215 M NaOH solution are needed to completely neutralize 2.50 ml of 0.825 M H2SO4 solution? I got 19.2 ml 2. A 10.0-ml sample of vinegar which is an aqueous solution of

    asked by Jessica on December 6, 2010
  6. chemistry

    An aqueous solution of phosphoric acid, H3PO4, contains 285 g H3PO4 in 400 mL solution, and has a density of 1.35 g/mL. Calculate a. the weight % H3PO4 in this solution. b. the concentration in mol/L of this solution

    asked by princess on November 10, 2010
  7. Chemistry College

    If KHP sample 1 requires 22.47 mL of aqueous NaOH, how many milliliters of NaOH should be needed for samples 2 and 3?

    asked by Belinda on April 18, 2013
  8. chemistry

    What is the chemical equation that describes the complete neutralization of H3PO4 by NaOH? A. H3PO4 + 2NaOH Na2HPO4 + 2H2O B. H3PO4 + H2O H2PO4- + H3O+ C. H3PO4 + NaOH NaH2PO4 + H2O D. H3PO4 + 3NaOH Na3PO4 + 3H2O

    asked by erika on September 14, 2016
  9. Chemistry

    Hi,may I have your help? I have posted a titration question that I'm trying to solve. The correct answer to the problem is 0.128 M, however,I have arrived at the answer: 0.000128 M. Here's the question: If 38.30 mL of 0.250 M NaOH

    asked by Cliff on December 10, 2010
  10. chemistry

    A sample of 7.83 grams of NaOH is dissolved into 620 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 1.67 gallons of water. (You may assume that the two volumes can be added.) What is the

    asked by Anonymous on September 6, 2010

More Similar Questions