Ask Question
17 February, 17:59

Adding powdered limestone (calcium carbonate) to a lake affected by acid rain can decrease the availability of phosphate ion, an important nutrient, but not nitrate ion another nutrient. Write a balanced equation and calculate the standard free energy change for the process to confirm its spontaneity.

+1
Answers (1)
  1. 17 February, 19:29
    0
    The reaction is:

    H⁺

    CaCO₃ ⇄ Ca²⁺ + CO₃ ⇄ HCO₃

    The standard free energy change is ΔG = ΔH - TΔS

    Explanation:

    Limestone is a mineral familiar with calcium carbonate, and being very common, the acid present in acid rain dissolves it reacting with carbonate, since the acids present in acid rain are characterized by being highly soluble in water and are also strong acids. The reaction is as follows:

    H⁺

    CaCO₃ ⇄ Ca²⁺ + CO₃ ⇄ HCO₃

    The spontaneity of the reaction is equal to:

    ΔG = ΔH - TΔS

    The sign of the standard free energy changes from positive to negative.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Adding powdered limestone (calcium carbonate) to a lake affected by acid rain can decrease the availability of phosphate ion, an important ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers