CHEMISTRY PLEASE HELP

a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect?

b) How will the molar mass of an unknown acid be affected if some of the solid remained after the titration was complete? Will the concentration of the molar increase, decrease, or have no effect?

c) How will the concentration of acetic acid in vinegar be affected if the liquid retained in the pipet is blown out? Will the concentration of acetic acid in vinegar increase, decrease, or have no effect?

d) How will the concentration of acetic acid in vinegar be affected if during the titration an air bubble appears in the tip of the buret? Will the concentration increase, decrease, or have no effect?

  1. 👍 0
  2. 👎 0
  3. 👁 1,569
  1. a)Here are the equations used for the standardization of NaoH>
    1. moles KHP = grams/molar mass
    2. moles NaOH = moles KHP
    3. M NaOH = moles NaOH/L NaOH
    If KHP is spilled that means grams is too small in equn 1 which makes moles small; eqn 2 makes moles NaOH too small, #3 makes M NaOH too small.

    b)equation:
    1. moles NaOH = L x M
    2. moles NaOH = moles unknown acid
    3. molar mass = grams/moles acid

    If some of the acid were not titrataed, then eqn 1 gives L too small which makes moles NaOH too small. Eqn 2 means moles unk acid too small. Eqn 3 means molar mass too large.

    c)equations:
    1. L x M = moles NaOH
    2. moles vinegar = moles NaoH
    3. L x M = concn vinegar.

    Volume in pipet blown out means L equn 1 too large, that makes moles vinegar and moles NaOH too large (equn 2). and eqn 3 makes concn vinegar too large.

    d)refer to equations in c.
    Air bubble appears in buret tip (but remains in the tip) means extra NaOH must be added so volume is too large frm equn 1 so moles NaOH too large, equn 2 means vinegar too high, and equn 3 means concn vinegar too high.

    1. 👍 0
    2. 👎 0
  2. 1) What effect would each of the errors described below have on the concentration of potassium hydrogenphthalate?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    One commercial method used to peel potatoes is to soak them in a solution of NaOH for a short time, remove them from the NaOH, and spray off the peel. The concentration of NaOH is normally in the range of 3 to 6 M. The NaOH is

  2. Chemistry Titration Lab HELP!

    Hi everyone! I just got a new lab that I MUST complete today, and it's about titration- I have absolutely no clue how to do it, it just doesn't make sense to me! I hope that someone can help explain to me how to do it so I can

  3. Chemisty

    The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.270 M NaOH. What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration

  4. Chemistry

    Hi everyone, I have been trying to figure out this titration equation all day and for some reason I am stumped. Here is the question in full: Potassium hydrogen phthalate, KHP, can be obtained in high purity and is used to

  1. College Chemistry

    "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent

  2. chemistry

    KHP is a monoprotic acid with a molar mass of 204.22 g/mol. The titration data are as following. The average concentration of NaOH solution is M. 1 2 3 mass of KHP (g) 2.789 2.543 2.612 vol NaOH used (mL) 27.77 23.22 27.12 You

  3. Chemisty

    The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.270 M NaOH. What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration

  4. chemistry

    PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that you have already done the TITRATION TUTORIAL and are familiar with the technique. 1. Prepare the NaOH

  1. CHEMISTRY> HELP QUICK! pls

    1. What is the amount of oxalate in 2 mL of 0.035M solution? a) 7 ¡Á 10¨C2 mole b) 1.75 ¡Á 10¨C2 mole c) 7 ¡Á 10¨C5 mole d) 1.75 ¡Á 10¨C5 mole 2. Sodium oxalate may be prepared by titrating oxalic acid (C2H2O4) with

  2. College Chemistry

    The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl

  3. Chemistry

    The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl

  4. 11th grade CHEMISTRY TITRATION LAB!

    i have a tritation lab due tomorrow and i am stumped on a couple things. its a titration lab using sodium hydroxide (NaOH)- 250 mL 0.300 M concentration, 10 mL of an unknown substance of vinegar, the avg. of titrated NaOH in the

You can view more similar questions or ask a new question.