Question

Task 2. Using standard values of free energy AG, determine AG for the following ion-exchange reactions and draw a conclusion about their possible direction. Examine results experimentally Caco, + 2H+-> H2O + Ca + CO2 To determine neutralization heat AHacestr it is necessary to refer the heat quantity to 1 mole of the substance, namely to alkali since acid is taken in excess (see alkalis and acids molarities and volumes). It is also necessary to take into account that ΔΗ is negative due to heat released in this process (exothermic reaction): AHneutr-q/n where n is number of alkali moles Task 2. Using standard values of free energy AGE determine AG for the following ion-exchange reactions and draw a conclusion about their possible direction. Examine results experimentally CaCO, + 2HHO Ca + CO2 To determine neutralization heat AHsest it is necessary to refer the heat quantity to 1 mole of the substance, natmely to alkali since acid is taken in excess (see alkalis and acids molarities and volumes). It is also necessary to take into account that ΔΗ is negative due to heat re this process (exothermic reaction): leased in Hneutrq/n where n is number of afkali moles. Task 2. Using standard values of free energy AGe determine AG for the following ion-exchange reactions and draw a conclusion abou their possible direction. Examine results experimentally. CaCO3 + 2H+→ H2O + Cat + CO2 Procedure. Prepare the initial substances by mixing equal volumes of soluble Ca2 salt and Na2CO, solution and soluble Pb salt and Na2SO4 solution. Treat the obtained precipitates with 5 ml of 1M HCL Note the results of the observation in the record. Write the equatiońs for the formation of CaCOs and PbSO

Answer 1

imo ぐ。 mc CA 1 1 ぐ.qq'< 3.{ mo) nence, 'trVe γ eon ґ, non-spontaneous