A) Write the NET IONIC equation (ONLY) that occurs when aqueous sodium carbonate solution is added to aqueous calcium chloride solution.
B) Write the NET IONIC equation (ONLY) for the reaction that occurs when the natural water containing Ca2+ and HCO3- ions is heated to boiling and both the precipitate and gas are formed.
C) Write the NET IONIC equation (ONLY) for the chemical reaction between Na2EDTA and Ca2+ ions. EDTA is used in the form of its sodium salt which for simplicity is written as Na2EDTA. Be consistent with this formula when writing the equation.