Completely eliminating the pollutant sulfur dioxide, $\text{SO}_2$, is challenging because of both cost and technical limitations. The amount released from furnace chimneys can be reduced by installing desulfurisation plants. In these plants, the gases are 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$\text{CaSO}_4$