Calculate the pH of a 0.10 M solution of aluminum chloride, which dissolves completely in water...

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Calculate the pH of a 0.10 M solution of aluminum chloride, which dissolves completely in water to give the hydrated aluminum ion [Al(H2O)6]3+ in solution.

Al3+(aq) + H2O(l) → [Al(H2O)6]3+(aq)
[Al(H2O)6]3+(aq) + H2O(l) → [Al(H2O)5OH]2+(aq) + H3O+(aq) Ka = 1.4 x 10-5
Soda water (carbonated water) is a solution of carbon dioxide in water. The solution is acidic because CO2 reacts with water to form carbonic acid, H2CO3. What are [H3O+], [HCO3-], [CO3-2] in a saturated solution of CO2 with an initial [H2CO3] = 0.033M

Al3+(aq) + H2O(l) → [Al(H2O)6]3+(aq)
[Al(H2O)6]3+(aq) + H2O(l) → [Al(H2O)5OH]2+(aq) + H3O+(aq) Ka = 1.4 x 10-5

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