Indicate the concentration of ions present in 0.20 M Ca(HCO3)2 solution.

0.20 M Ca2+, 0.20 M CO3-

0.20 M Ca2+, 0.40 M HCO3-

0.20 M Ca2+, 0.10 M HCO3-

0.20 M Ca2+, 0.20 M HCO3-

0.20 M Ca(HCO3)2