The given mass of cobalt chloride hydrate = 2.055 g
A sample of cobalt chloride hydrate was heated to drive off waters of hydration and the anhydrate was weighed.
The mass of anhydrous cobalt chloride = 1.121 g anhydrate.
The mass of water lost during heating = 2.055 g - 1.121 g = 0.934 g
Converting mass of water of hydration present in the hydrate to moles using molar mass:
Mass of water = 0.934 g
Molar mass of water = 18.0 g/mol
Moles of water =
Answer:
SEPARATION SCHEME FOR CATIONS
GIVEN CATIONS :
Step 1: Add of
to the mixture solution
Result : This would cause a precipitate of to be formed
Reaction :
Step 2 : Next is to remove the precipitate and add to the remaining
solution in the presence of of HCl
Result : This would cause a precipitate of to be formed
Reaction :
Step 3: Next remove the precipitate then add of aqueous
, process the solution in a centrifuge,when the
process is done then sort out the precipitate from the solution
Now this precipitate is and the remaining solution
contains
Next take out the precipitate to a different beaker and add HCl
to it this will dissolve it, then add a drop of this will
form a precipitate which will have the color of
blood indicating the presence of
Reaction :
Now the remaining mixture contains
Explanation: