Chemistry

posted by .

A Student Performing a lab weighed a 1.0993g sample, containing an unknown KHP, which required 18.06mL of 0.1879M NAOH to reach the phenolphtalein endpoint.

a) How many moles of base were consumed by the KHP in this sample?
b) How many grams of KHP were titrated?
c)What is the mass percent of KHP in the sample?

  • Chemistry -

    mols NaOH = M x L = ?
    mols KHP = same (1:1 ratio) from
    KHP + NaOH ==> KNaP + H2O.

    Calculate mass KHP from g = mols x molar mass.

    Then %KHP = (mass KHP/mass sample)*100 = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. general chemistry

    A student needs to determine by titration with NaOH the precise %KHP in an unknown sample that is thought to contain approximately 50%KHP. Approximately what mass of sample should the student use in order to use about 20mL of 0.1005 …
  2. Analytical Chemistry

    How do I find the mass of KHP? 0.5050 grams of KHP was used and placed into a 250mL volumetric flask and diluted to the mark with distilled water. 50.00mL of this KHP solution was placed in a 250mL beaker. It took 14.75mL of 0.0067M
  3. Chemistry

    A student actually used 0.847g sample of impure KHP and the endpoint was reached after 19.82 ml of sodium hydroxide solution was added, What is the percent KHP in the unknown to four significant figures.
  4. Chemistry

    A student actually used 0.847g sample of impure KHP and the endpoint was reached after 19.82 ml of sodium hydroxide solution was added, What is the percent KHP in the unknown to four significant figures.
  5. Chemistry

    A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP....?
  6. CHEMISTRY

    Not for homework, just practice problems I'm having trouble with. Knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralize 30.0 mL of the 0.10 M NaOH solution?
  7. college chemistry

    If KHP sample #1 requires 27.30 mL of NaOH solution to reach an endpoint, what volume should be required for samples #2 and #3?
  8. chemistry

    a 1.32g sample on unknown containing KHP as a component was titrated with 22.48mL of 0.105 M NaOH to a pheolphthalein end point. what is the weight percent of KHP in the unknown sample?
  9. Chemistry

    A standard KHP solution is made by dissolving 2.12 grams of KHP in 100.00 mL of water. The KHP solution is then titrated with NaOH solution. It takes 23.12 mL of NaOH to reach the endpoint. What is the concentration of the NaOH?
  10. chemistry

    if .5 g of a KHP containing unknown mixture requires 7 mL of NaOH to reach the endpoint of titration, what mass of the unknown should be weighed out to consume 20 mL of the NaOH. If anyone could help me start this that would be appreciated. …

More Similar Questions