Crystallisation
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What is an hydrated salt ?
Does contain water of crystallisation
What is an anhydrous salt ?
Does not contain water of crystallisation
Suggest one modification that the student could make to their method to reduce the percentage error in the mass of water removed ?
*increase the initial mass used *use a 3dp mass balance
How could the student modify the experiment to be confident that all the water of crystallisation has been removed?
By reheating still it reaches a constant mass to confirm all the water of crystallisation had been removed
How to determine the formula of an hydrated structure eg calcium chloride ?
*find the mr of the calcium chloride *you be given an hydrated calcium chloride molar mas and if not find it *take them away from each other *divide by 18(mr of water) *write empirical formula