Finding out the accurate concentrain of sulphuric acid
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 Ã 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
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
I will use 2.650g of Na2CO3 in 250cm3 of distilled water.
ÃÂ· Weighing bottle
ÃÂ· Clamp stand
ÃÂ· Glass rod
ÃÂ· 250cm3 volumetric flask
ÃÂ· Small conical flask
ÃÂ· 50cm3 burette
ÃÂ· 100cm3 beaker
ÃÂ· 25cm3 pipette
ÃÂ· Pipette filler
ÃÂ· Plastic pipette
ÃÂ· Small filter funnel
ÃÂ· Distilled water
ÃÂ· Sulphuric acid
of sodium carbonate
ÃÂ· White tile
ÃÂ· Methyl orange indicator
ÃÂ· I will make a solution where the solute will be the sodium carbonate and the solvent will be distilled water.
ÃÂ· I will first measure the weighing bottle on its own without the lid on.
ÃÂ· I will then make the weight of the bottle equal to 0.00g on the balance.
ÃÂ· I will add 2.650g of sodium carbonate using a spatula.
ÃÂ· I will then pour the sodium carbonate into a beaker, which has been washed out with distilled water to remove unwanted compounds.
ÃÂ· I will weigh the mass of the weighing bottle without...