PURPOSE To determine the amount of water of crystallization in one mole of a hydrated salt and its formula

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         IBDP-1

IBDP (2012-2014)

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                                                      CHEMISTRY   

NAME OF STUDENT                                             NAME OF TEACHER                                                    

TITLE OF INVESTIGATION

                                                   

LEVEL -                      HL                        SL                                               DATE -   

TOPIC -                                                                                             TIME (IN HOURS) -                                        

               

USE OF ICT   (IF ANY) –

DATA LOGGING

GRAPH PLOTTING SOFTWARE

SPREADSHEET

DATABASE

COMPUTER MODEL / SIMULATION

CRITERIA   ASSESSED

DESIGN (D)

DATA COLLECTION AND PROCESSING (DCP)

CONCLUSION AND EVALUATION (CE)

PURPOSE

To determine the amount of water of crystallization in one mole of a hydrated salt and its formula.

HYPOTHESIS

Hydrates are inorganic ionic salts that contain a specific number of water molecules loosely attached as a part of their structure. The water is chemically combined with the salt in a definite ratio. In this experiment, the percentage composition of water can be calculated based on the masses of the anhydrous and hydrated salt. The chemical formula of this hydrate in general is CuSO4.XH2O. Thus the achieved result from this experiment should probably be x=5. Therefore copper sulphate should have a formula of CuSO4.5H2O. When it is heated gently, the water is released as vapours and we can describe this reversible reaction as:

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                                CuSO4.5H2O                 CuSO4 + 5H2O

BACKGROUND

The amount of water present in the hydrate is determined by heating the hydrated salt in a crucible and thereby measuring the difference between the mass of the salt before and after heating.

APPARATUS

1 Ceramic crucible

1 Bunsen burner

1 Ring stand

1 Pipe -clay triangle

1 Tongs

1 Electronic balance (+ 0.01g)

REAGENTS

Hydrated copper sulphate

SAFETY

  1. Hot items look the same as cool items. Be sure to wait until glassware is cool before transferring it from place to place
  2. Wear laboratory ...

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