Question

2. Which would you expect to be more sol Explain your reasoning. be more soluble in water, strontium thiosultado ntium thiosulfate or calcium thiosulfate? 3. Both chlorine and bromine can act as oxidizing agents. When KCl and Br2 are combined in the presence of methylene chloride, the color of the methylene chloride layer after thorough mixing is the color of bromine. Which is the stronger oxidizing agent, bromine or chlorine? Explain your reasoning.

Answer 1

Answer :

(2) : Calcium thiosulfate is more soluble in water than strontium thiosulfate . This is because , size of strontium is greater than calcium. On increase in size lattice energy increase but hydration energy decrease (because of less electron charge density) . So, calcium thiosulfate is more soluble in water.

(3) : According to the given condition , when KCl and Br​​​​​2 combined in presence of methylene chloride , the color of methylene chloride layer after through mixing is the color of bromine , it means there is no reaction and Bromine remain as it is in the mixture

KCl + Br​​​​​2 ----> no reaction

It means Br​​​​​2 can not replace Cl​​​​​- from KCl , it means Bromine is weaker oxidizing agent than chlorine because chlorine can replace Br​​​​​- from KBr

2 KBr + Cl​​​​​2 -----> 2KCl + Br​​​​​2

So, stronger oxidizing agent is chlorine .