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Unformatted text preview: (II) sulphate solution. Try to keep the solution covered as much as possible from this point on. IV. Record the temperature of the copper (II) sulphate solution to the nearest 0.1 o C every 60.0 seconds for 25 minutes. V. At precisely 3.0 minutes, add zinc powder to the cup. Swirl the mixture gently. VI. Continue to swirl the contents of the calorimeter and record the temperature for an additional 6 minutes. VII. Dispose of the products of this reaction in the waste container. Zn (s) + CuSO 4(aq) Cu (s) + ZnSO 4(aq) Amount of CuSO4 = Amount of Zn = Therefore Zn is the limiting reagent Mass of H2O = Heat evolved = Therefore enthalpy change for the reaction Uncertainty in H = % of uncertainty in mass of Zn + % of uncertainty in time + % o f uncertainty in temperature + % of uncertainty in time...
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This note was uploaded on 12/12/2011 for the course COMP 0112 taught by Professor Mr.kwok during the Summer '11 term at Hong Kong Baptist University, China.
- Summer '11