Completely eliminating the pollutant sulfur dioxide, $\text{SO}_2$, is challenging for both financial and technical reasons. The amount released from furnace chimneys can be reduced by installing desulfurisation plants. The gases are then scrubbed (washed) with calcium hydroxide so that the $\text{SO}_2$ is removed. What is the principal product formed at first?
- A$\text{Ca(HSO}_4)_2$
- B$\text{CaS}$
- C$\text{CaSO}_3$
- D$\text{CaSO}_4$