Given the double displacement reaction between aqueous solutions of sulfuric aci
ID: 957229 • Letter: G
Question
Given the double displacement reaction between aqueous solutions of sulfuric acid and aluminum hydroxide: in the balanced molecular equation the coefficient of sulfuric acid is____ , the coefficient of aluminum hydroxide is____ , the coefficient of the product containing aluminum ion is____ , and the coefficient of water is_____ . (hint: you're right, aluminum hydroxide is insoluble. If we put some in water it will not dissolve, but if we then add a sulfuric acid solution, a reaction will definitely take place. To balance the equation in water-forming double displacement reactions, it's easier to think of water as HOH. The 1st H has come from the H+ donated by the acid. The 2nd H is part of the OH- ion donated by the other compound. Based on charge, H+ and OH- go together in what ratio? Then, in the molecular equation, write HOH using it's proper molecular formula, H2O.
In the double displacement reaction between sulfuric acid and aluminum hydroxide, the spectator ions are:
(hint: ok, now the state of aluminum hydroxide as a reactant matters in coming up with the correct answer(s).
Explanation / Answer
3 H2SO4 (aq.) + 2 Al(OH)3 (s) --------> Al2 (SO4)3 (aq.) + 6 H2O (l)
Therefore,
Coefficient of sulphuric acid = 3
Coefficient of Aluminium hydroxide = 2
Coefficient of Aluminium sulphate = 1
Coefficient of water = 6
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