Chemistry - Titrations

posted by .

This is one of those titration labs, maybe you could answer it?
Why must a buret be rinsed with NaOH solution before it is filled and not water?

Note: ( Buret will be full of NaOH )

  • Chemistry - Titrations -

    Distill water has pH = 7 and NaOH is a strong base (pH > 7)... if you mix NaOH with water, it will neutralize some of the base (decrease the pH to be closer to 7) and thus contaminate the NaOH solution.

  • Chemistry - Titrations -

    If you rinse with water it dilutes the NaOH that you add later and that isn't what you want.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. acid-base titrations

    For each of the following circumstances, indicate whether the calculated molarity of NaOH would be lower, higher or unaffected. Explain your answer in each case. a.the inside of the pipet used to transfer the standard HCI solution …
  2. chemistry

    So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then …
  3. AP Chemistry

    So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then …
  4. Chemistry

    So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then …
  5. chemistry

    When filling the buret with NaOH solution, you left an air bubble in the buret tip. The bubble was released durning your first KHP titration. Would the following technique error result in an erroneously high or reeoneously low calculated …
  6. CHM general 2

    Indicated whether the calculated molarity of NaOH would be lower or higher Than the real value; or unaffected?
  7. chemistry

    calculate the morality of THE H2SO4 solution for each of the three runs. do the three values agree closely together with each other. Part A. Titration 1 volume of unknown acid =20ml initial buret reading of NaOH =0.5 ml final buret …
  8. Chemistry

    A buret is partially filled with NaOH solution, to a volume of 1.14 mL. A 20-mL sample of 0.1011 M HCl is titrated to a faint pink phenolphthalein endpoint. The final buret reading is 22.37 mL. What is the molartiy of the NaOH solution?
  9. CHEMISTRY

    a solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.404 g; buret reading before …
  10. Chemistry

    A buret is partially filled with NaOH solution, to a volume of 1.14mL. A 20-mL sample of 0.1011 M HCl is titrated to a faint pink phenolphthalein endpoint. The final buret buret reading is 22.37mL. What is the molarity of the NaOH …

More Similar Questions