Determining the Concentration of Sulphuric Acid

Determining the Concentration of Sulphuric Acid

Risk assessment

· CorrosiveAs sulphuric acid and sodium hydroxide are both corrosive,

I will wear gloves, goggles and lab coat when performing the

experiment

· Eye protection must be wornIf any breakages occur I will carefully

dispose of the glass in a suitable bin.

· If any spillages occur during my experiments I will clean them

promptly.

Dilution of H2SO4

As the concentration of the sulphuric acid~10moldm-3, it is too

concentrated for my experiments so I will dilute it to approx

0.05moldm-3.

Apparatus –

· 50.0cm3 pipette

· 100.00cm3 graduation flask

· deionised water

· dropper

· 50.0cm3 pipette

· 250.00cm3 graduation flask × 2

Method-

· Pipette 50.0cm3 of the aqueous sulphuric acid into a 100.00cm3

graduation flask

· Add deionised water up to the graduation mark and agitate to ensure

a homogenous solution.

· Pipette 25.0cm3 of the new solution into a 250.00cm3 graduation

flask

· Add deionised water up to the graduation mark and agitate.

· Pipette 25.0cm3 of the new solution into a 250.00cm3 graduation

flask

· Add deionised water up to the graduation mark and agitate.

[154 words]

Titration of Aqueous Sulphuric Acid and Aqueous Sodium Hydroxide –

Method 1

Apparatus-

· Solution of sulphuric acid (approx 0.05moldm-3)

· NaOH solution, 0.100mol dm-3

· 50.00cm3 Burette

· 25.0cm3 Pipette

· Small Funnel

· Clamp and stand

· 250.0cm3 Conical flasks

· Methyl orange indicator

Diagram

Method

· Set up the stand and buret...

... middle of paper ...

...

: 0.001

Therefore 0.001 moles of H2SO4 (~ 0.05 moldm-3) is needed to produce

24.00 cm3 of CO2

Volume of H2SO4

0.001 moles of H2SO4, I will use the same approx concentration of H2SO4

~ 0.05 moldm-3 as I have already prepared it.

Volume = moles / concentration

= (0.001 / 0.05) × 1000

=20.0cm3

Mass of MgCO3

F.mass of MgCO3= 24.3+ 12.0 + (3 × 16.0)

= 84.3

Mass= formula mass × Moles

= 84.3 × 0.001

~ 0.0843g

In order to ensure that all of the aqueous sulphuric acid reacts I

will use MgCO3 in excess and so I will use 1g of MgCO3.

Reference-

· Indicators -

http://www.chemguide.co.uk/physical/acidbaseeqia/indicators.html

· A-Level Chemistry, 3rd Edition, E. N. Ramsden page 71-74, Volumetric

Analysis

· Cambridge Advanced Sciences, Chemistry 1,