What are the possible sources of error in the simple calorimetric experiment to determine the enthalpy of dehydration of magnesium sulfate-7-water?
Corrie writes …. The usual culprit here is heat loss to the surroundings if you using the simple ‘insulated cup’ method. Insufficient stirring, so that not all the solid is dissolved is another. A ‘chemical’ source of error is that the anyhydrous salt, which forms one half of the experiment, may not be completely anhydrous and will also absorb water from the air if left exposed for any length of time. Risk assessment Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely on what is said on this website. For further guidance see our tutorial on Risk Assessment.
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