LOL. That's a very big a deviation from the original question.
Your reaction mixture should contain hydrogen ions (in virtue of being an acid), copper(II) ions and the metal tin. With reference to the electrochemical series, we know that the hydrogens ions are more reactive than copper(II) ions. Hence, the hydrogen ions will react with tin, not the copper(II) ions. Effectively, this is just a chemical reaction between acid and metal.