Answer:
Step-by-step explanation:
Yes, that is correct.
When aluminum sulfate solution (Al2(SO4)3) and calcium hydroxide solution (Ca(OH)2) are mixed, a double displacement reaction occurs, resulting in the formation of solid aluminum hydroxide (Al(OH)3) and solid calcium sulfate (CaSO4). The balanced chemical equation for this reaction is:
Al2(SO4)3 + 3Ca(OH)2 → 2Al(OH)3 + 3CaSO4
The aluminum hydroxide precipitates out of the solution as a gelatinous solid, while the calcium sulfate forms a white solid. This reaction is commonly used in water treatment plants to remove impurities from drinking water, as the aluminum hydroxide acts as a coagulant that binds to particles and organic matter in the water, allowing them to be removed more easily.