Question

Which is more soluble in Water?? NaCl or Mgcl2.. Explain why

Answer 1

NaCl is more soluble in water as when water is added NaCl breaks down into Na+ and Cl- as there is only one atom of each. Whereas there is one atom of Mg and 2 atoms of Cl in MgCl2 which makes its separation harded than that of dissolving NaCl.

Hope this helps you...

Answer 2

$MgCl_2$ is more soluble in water.

• NaCl breaks down in the water as $Na^+$ and $Cl^-$ ions and $MgCl_2$ as $Mg^{+2}$ and $Cl^-$ ions.
• Magnesium ion has high charge than sodium ion so, water easily attacks small magnesium cation.
• So, hydration energy increases and it easily dissolves in water than sodium ions.
• That's why $MgCl_2$ is more soluble in water than sodium chloride.