Question

Solid magnesium carbonate (mgco3) and solid sodium nitrate were mixed, placed in water, and stirred. what is observed? 1. mgco3 and nano3 will not dissolve. 2. mgco3 and nano3 will dissolve. 3. mgco3 will remain undissolved and nano3 will dissolve. 4. nano3 will remain undissolved and mgco3 will dissolve.

Answer 1

Answer: Option (3) is the correct answer.

Explanation:

When lattice energy of a compound is more than its hydration energy then the compound is insoluble in water.

Moreover, magnesium carbonate is a precipitate formed by chemical combination of aqueous solutions of magnesium chloride and sodium bicarbonate.

On the other hand, hydration energy of sodium nitrate is more than its lattice energy. Therefore, sodium nitrate is soluble in water and it will readily dissolve.

thus, we can conclude that $MgCO_{3}$ will remain undissolved and $NaNO_{3}$ will dissolve.

Answer 2

MgCO3 will remain undissolved and
NaNO3 will dissolve