Titration Flashcards
(15 cards)
What is the first step in weighing by difference for making a solution?
Use a spatula to measure out around 2.6g of anhydrous sodium carbonate.
What should be done after measuring the anhydrous sodium carbonate?
Transfer solid to a 100cm³ beaker.
What is the next step after transferring the solid to the beaker?
Reweigh and record the mass of the used boat.
What can be calculated using the measurements taken during the weighing process?
The exact mass of anhydrous sodium carbonate.
Fill in the blank: The initial mass measurement will include the mass of the _______.
boat
How to make a solution?
Making a Solution - Amount of substance
- weighing by difference.
1) use a spatula to measure out around 2. 6g of anhydrous sodium
carbonate. - The value will include mass of the boat
2) Transfer solid to 100cm3 beaker
3) Reweigh and record mass of the used boat.
4) Using these measurement, you can calculate exact mass of
anhydrous sodium carbonate.
What is the first step in titrating a solution?
Use the pipette and pipette filler to add 25cm³ volume of sodium hydroxide solution to a clean conical flask.
What do you add after the sodium hydroxide solution?
Add a few drops of indicator and pour the conical flask onto a white tile.
What should you do after preparing the conical flask?
Fill the burette with hydrochloric acid and note the starting volume.
How should you add the acid from the burette?
Add slowly the acid from the burette to the solution in the conical flask, swirling to mix.
When should you stop adding the acid?
Stop adding the acid when the end point is reached and note the final volume reading.
How do you calculate the volume of acid added?
Calculate the volume of acid added to neutralise the alkali by subtracting the starting volume from the final volume.
This value is known as the titre value.
What should you do after the first titration?
Repeat steps 1-5 until concordant results are obtained.
How can more accurate results be obtained?
More accurate results are obtained if acid is added drop by drop near to the end-point.
What are the whole steps of titration?
Titrating a solution :
1) use the pipette and pipette filler to add 25cm3 volume of sodium
hydroxide solution to a clean conical flask.
2) Add a few drops of indicator and put the conical flask on
a white tile.
3) fill the burette with hydrochloric acid and note the starting
volume.
4) Add slowly the acid from the burette to the alkali in the
conical flask swirling to mix.
5 Stop adding the acid when the end point is reached - Note
the final volume reading.
b) calculate the volume of acid added to neutralise the alkali
(the titre value) of 1difference.
7) RePeat Steps 1-5 unil concordant tines are obtain.
8) More accurate results are obtained if acid is added
drop by drop near to the end - point.
