Final answer:
The correct formula for cesium hypochlorite decahydrate is D. CsCl·10H2O, where 'cesium' indicates Cs+, 'hypochlorite' represents ClO-, and 'decahydrate' signifies 10 water molecules associated with each formula unit, resulting in a 1:1:1 ratio of cesium, hypochlorite, and water molecules, respectively.
Step-by-step explanation:
The formula for cesium hypochlorite decahydrate is D. CsCl·10H2O. We can break down the naming of this compound to understand its composition. The 'cesium' part of the name indicates the presence of the Cs+ ion. 'Hypochlorite' refers to the ClO- ion, and 'decahydrate' indicates that there are 10 water molecules (10H2O) associated with each formula unit of the compound. Therefore, combining Cs+ and ClO- in a 1:1 ratio along with 10 water molecules results in the formula CsCl·10H2O.
It's important to recognize that each ion contributes once to the formula because of their 1:1 ratio. This is corroborated by the fact that similar compounds, like sodium hypochlorite, also maintain this ratio of metal to hypochlorite ion. This differs from hydrated forms of other compounds, such as cobalt (II) chloride hexahydrate, which is represented as CoCl₂·6H₂O because of its specific composition. Also, when forming hydrates, the water molecules are represented separately at the end of the chemical formula, as seen in the example provided.