Finding the Concentration of a Sample of Sulphuric Acid

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Finding the Concentration of a Sample of Sulphuric Acid

The purpose of our experiment is to find the concentration of a sample

of sulphuric acid accurately. We are provided with a range of

indicators, solid anhydrous sodium carbonate and access to all

laboratory glassware and equipment.

Apparatus needed: -

-------------------

Requirements to produce a Sodium Carbonate solution: -

======================================================

Electronic Balance (accurate to 2 decimal places)

Goggles

Spatula

Distilled Water (250cm3)

Anhydrous Sodium Carbonate (2.65g)

Beaker - 250cm3

Stirring Rod

Petri Dish

Pipette

Volumetric flask

Requirements for the titration experiment: -

============================================

Goggles

Burette (50cm3)

Stand and Clamp

Conical flask

Sulphuric (IV) Acid (n*50cm3 based on how many repeats are conducted)

Prepared Sodium Carbonate Solution

Methyl Orange Indicator (10cm3)

Funnel

Pipette

Pipette filler

White Tile

Method

------

Method for the production of Sodium Carbonate solution

======================================================

1. Use the volumetric flask to get 250cm3 of distilled water

2. Place 2.65g of sodium carbonate in a petri dish (weighed on the

electronic balance).

3. Pour the solid into a beaker. Wash the petri dish with some

(perhaps 10cm3) of the 250cm3 distilled water so that all of the solid

is used and place the washings in the beaker also. Then pour the rest

of the distilled water.

4. Stir with glass rod so that the solid is fully dissolved.

5. You should be left with 250cm3 of 0.1 mole dm3 sodium carbonate

solution.

Method of Titration

===================

1. Attach clamp to stand and then clamp the burette vertically (place

the burette high enough so the conical flask can fit underneath it).

2. Place a funnel into the top of the burette and then rinse the

burette out by letting some sulphuric acid run through it.

3. Make sure the burette tap is closed and then fill the burette with

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