In aqueous solution the ionisation constants for carbonic acid are K1 = 4.2 × 10–7 and K2 = 4.8 × 10–11. Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
The concentration of H+ is double that of CO2–
3
3
The concentration of CO2–
3 is 0.034 M
3 is 0.034 M
The concentration of CO2–
3 is greater than that of HCO–
3
3 is greater than that of HCO–
3
The concentrations of H+ and HCO–
3 are approximately equal
3 are approximately equal