Question

calcium chloride when dissolve is
water dissociate into its lons according to the following equation
CaCl2 -----> Ca2 + 2Cl
calculate the number of Ions obtained from cacl2 when 22 gram of it is dissolve in water ​

Answer 1

Answer:

Explanation:

1mole→111g of CaCl  

2

​  

 

∴222g of CaCl  

2

​  

 is equivalent to 2 moles of CaCl  

2

​  

 

Since 1 formula unit CaCl  

2

​  

 gives 3 ions, therefore, 1 mol of CaCl  

2

​  

 

will give 3moles of ions

2 moles of CaCl  

2

​  

 would give 3×2=6 moles of ions.

No. of ions = No. of moles of ions X Avogadro number

=6×6.022×10  

23

 

=36.132×10  

23

 

=3.6132×10  

24

ions

Hence the correct option is D.

Answer 2

Answer:

1mole→111g of CaCl 2

∴222g of CaCl 2

is equivalent to 2 moles of CaCl2

Since 1 formula unit CaCl2

gives 3 ions, therefore, 1 mol of CaCl2

will give 3moles of ions

2 moles of CaCl2

would give 3×2=6 moles of ions.

No. of ions = No. of moles of ions X Avogadro number

=6×6.022×10^23

=36.132×10^23

=3.6132×10^24 ions