Enterbot3 Posted August 4, 2019 Report Share Posted August 4, 2019 Hi, My teacher and I came up with a question which we thought was suitable. I was wondering whether this could get me a level 7. Using Hess’s Law – Measure the enthalpy changes for the dissolving an anhydrous and hydrated salt (such as copper sulfate or cobalt chloride) in order to work out the enthalpy for the hydration process. My independent Variable: Oxidation states of metals. i.e copper (I) sulphate, Copper (II) sulphate cobalt (I) chloride and cobalt (II) chloride (the roman numeral indicates the oxidation state of the metal. Varying the mass of each oxidation state of metal in hydrated salt. My dependent variable: The enthalpy change of hydration. However, I am aware that the independent variable is a bit dodgy as its not really effective quantitative data. Are there any other suggestions? I thought changing the moles of the metals, but that would also mean that the change in mole would occur for the product side as well, balancing out the change in enthalpy. Am I correct or not? Reply Link to post Share on other sites More sharing options...
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