Is MgCl2 (Magnesium chloride) soluble or insoluble in water? The answer is that it is soluble in water. It is an ionic compound which readily dissociates into its ions in water.
These are some of the basic rules for solubility ( [ Ссылка ]):
Salts of:
- Group I elements (Li+, Na+, K+, Cs+, Rb+) are
- NH4+ (Ammonium ion) are soluble.
- the nitrate ion (NO3-) are generally soluble.
- of Cl-, Br-, and I- are soluble. Exceptions Ag+, Pb2+, and (Hg2)2+
- most sulfates are soluble. Exceptions: Ba2+, Ca2+, Pb2+, Ag+, Sr2+
- most hydroxide salts are only slightly soluble. Exceptions: NH4+, Li+, Na+, K+
- most carbonates (CO32-) are insoluble. Exceptions: Group 1 and NH4+
Note: Rules at the top supersede any lower rules.
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We can also look a Solubility Table ([ Ссылка ]). On the solubility table we can see that MgCl2 (Magnesium chloride ) is soluble in water.
Because it is soluble in water, we would expect that it would dissociate into its ions.
Solubility Resources:
- Solubility Rules and the Solubility Table: [ Ссылка ]
- Net Ionic Equations: [ Ссылка ]
- Finding the Charge on Ions: [ Ссылка ]
We could also just get some MgCl2 and see if it dissolves in water, that would also tell us if it is soluble or insoluble.
While we could look at the solubility constant, called the Ksp, for MgCl2 it usually isn’t used as MgCl2 is a highly soluble compound. KsP is more appropriate for slightly soluble and insoluble compounds.
