# A spectator is an ion that is present at the scene of

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Example:A tiny piece of solid potassium is dropped into a solution of hydrochloric acid. A violent reaction occurs, emitting bubbles of hydrogen gas. The solution that remains is aqueous potassium chloride. Write the conventional, total ionic, and net ionic equations for this reaction.
Write the conventional, total ionic, and net ionic equation for the reaction of sodium fluoride solution and hydrochloric acid, yielding sodium chloride and hydrofluoric acid.
Single-Replacement Oxidation-Reduction (Redox) ReactionsRecall that the general equation for a redox reaction is:A + BX → AX + BConsider the following problem:Solid barium is added to a solution of aluminum nitrate. Write the net ionic equation for the reaction that occurs.Conventional Equation:3 Ba(s) + 2 Al(NO3)3(aq) → 3 Ba(NO3)2(aq) + 2 Al(s)Total Ionic Equation:3 Ba(s) + 2 Al+3(aq) + 6 NO3-(aq) → 3 Ba2+(aq) + 6 NO3-(aq) + 2 Al(s)Net Ionic Equation:3 Ba(s) + 2 Al3+(aq) → 3 Ba2+(aq) + 2 Al(s)
Now, the question is If we placed a strip of aluminum into a solution of barium nitrate, will the reaction proceed in the opposite direction?
Example:Write the conventional, total ionic, and net ionic equations for the reaction between nickel and a solution of magnesium chloride.
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