Titration-finding the concentration of a solution of sulphuric acid

Finding out the accurate concentrain of sulphuric acid

Aim

The point of this investigation is to find out the concentration of the sulphuric acid in my experiment. I will do this by titrating the sulphuric acid with sodium carbonate.

H2SO4 + Na2CO3 Ã Na2SO4 + H2O + CO2

Acid + Alkali à Salt + Water + Carbon dioxide

Ratio of sulphuric acid to sodium carbonate:

H2SO4 : Na2CO3

1 : 1

Concentration of sulphuric acid:

H2SO4 is approximately 0.05 - 0.15 moldm-3

The average concentration of the sulphuric acid is:

0.05 + 0.15 = 0.1 moldm-3

2

Concentration (moldm-3) = concentration (g dm-3)

Molar mass (g mol-1)

Mr of Na2CO3 = (23 x 2) + ( 16 x 3)

= 106 g mol-1

250cm3 x 0.1moldm-3 x 106 gmol-1 = 2.650g

1000cm3

I will use 2.650g of Na2CO3 in 250cm3 of distilled water.

Apparatus

· Weighing bottle

· Clamp stand

· Glass rod

· 250cm3 volumetric flask

· Small conical flask

· 50cm3 burette

· 100cm3 beaker

· 25cm3 pipette

· Pipette filler

· Plastic pipette

· Small filter funnel

· Balance

· Distilled water

· Sulphuric acid

· 2.650g

Titration setup. The burette would normally be hel...

English: Author: John Dalton; Year: 1808

English: 96% sulfuric acid

of sodium carbonate

· Spatula

· White tile

· Methyl orange indicator

Method

· I will make a solution where the solute will be the sodium carbonate and the solvent will be distilled water.

· I will first measure the weighing bottle on its own without the lid on.

· I will then make the weight of the bottle equal to 0.00g on the balance.

· I will add 2.650g of sodium carbonate using a spatula.

· I will then pour the sodium carbonate into a beaker, which has been washed out with distilled water to remove unwanted compounds.

· I will weigh the mass of the weighing bottle without...