Question

100ml of 0.1M Ca(No3)2 solution is mixed with 100ml of 1M AgN03 find the molaritu of nitrate ion in the solution​

Answer 1

Answer:

Explanation:

Avogadro's number is  6.023×10  

23

 

1.2×10  

22

 ions corresponds to  

6.023×10  

23

 

1.2×10  

22

 

​

=0.02 moles.

100 mL of 0.1M solution of CoCl  

3

​

.6H  

2

​

O corresponds to  

1000mL/L

100mL

​

×0.1M=0.01moles.

0.01 moles of CoCl  

3

​

.6H  

2

​

O reacts with excess AgNO  

3

​

 to form 0.02 moles of AgCl precipitate, which means 0.01 moles of Ag  

+

 and 0.01 moles of Cl  

−

 ions.

Thus, from one molecule of CoCl  

3

​

.6H  

2

​

O, one chlorine atom is displaced. Hence, the complex is  

[Co(H  

2

​

O)  

5

​

Cl]Cl  

2

​

.H  

2

​

O as number of chloride ion outside co-ordination sphere should be one.