Dry Soil (500 mg) is mixed with 40 mL of a solution containing 25 mmol/L PbSO4 at pH 4. After equilibrium for 24 h, a supernatant solution is collected and found to contain 17.3 mmol/L Pb2+ and 24.9 mmol/L SO4-. Calculate qP and qSO4for the soil in mmol/kg

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.