Calcium is obtained by
Electrolysis of molten CaCl2
Electrolysis of solution of CaCl2 in water
Reduction of CaCl2 with carbon
Roasting of limestone
Electrolysis of molten CaCl2 gives the metal Calcium at the cathode (reduction)
Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction, CaCO3 + 2HCl --> CaCl2 + H2O
What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?