why MgSO4 soluble in water whereas BaSO4 is insoluble in water?
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Solubility is a relative term. There are no compounds (or hardly any compound) that is completely insoluble in water. Thus in our question, we are assuming the fact that MgSO4 is more soluble than BaSO4.
Generally, solubility is related with lattice energy. More the lattice energy, less the solubility. Thus compounds containing ions with a -2 charge are normally not soluble in water. BaSO4 has Ba2+ and So4 2-. If the salt is composed of highly charged ions, it is insoluble in water.
Anhydrous form of MgSO4 is hygroscopic and thus highly soluble in water. MgSO4 is composed f relatively low charged ions and thus it is very soluble in water.
Generally, solubility is related with lattice energy. More the lattice energy, less the solubility. Thus compounds containing ions with a -2 charge are normally not soluble in water. BaSO4 has Ba2+ and So4 2-. If the salt is composed of highly charged ions, it is insoluble in water.
Anhydrous form of MgSO4 is hygroscopic and thus highly soluble in water. MgSO4 is composed f relatively low charged ions and thus it is very soluble in water.
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2
Answer:
hydrogen energy of mg2+ions is greater than of Ba2+ion
Explanation:
The lattice energy of BaSO 4
predominates over its hydration energy while in MgSO 4
mg2+ being smaller in size and thus hydration energy predominates over lattice energy of MgSO
4
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