Two test tubes contain solutions of magnesium and barium chlorides. How to recognize them with alkali?
| September 11, 2021 | education
Two test tubes contain solutions of magnesium and barium chlorides. How to recognize them with alkali? Write the reaction equations in molecular and ionic form.
When an alkali solution is added to a test tube with magnesium chloride, a precipitate of insoluble magnesium hydroxide will precipitate. No changes will occur in the barium chloride test tube.
MgCl2 + 2NaOH = 2NaCl + Mg(OH)2
Mg2+ + 2Cl– + 2Na+ + 2OH– = Mg(OH)2 + 2Na+ + 2Cl–
Mg2+ + 2OH– = Mg(OH)2
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