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Unknown Metal Reaction

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Unknown Metal Reaction
In this experiment, we examine the reaction between the unknown metal (which is Magnesium, Aluminum, Tin, or Zinc) and hydrochloric acid. When heats strongly, the metal reacts readily with hydrochloric acid and oxygen in the air. After it forms new compound (residue) and cools down, we measure the mass of the compound (MgCl2, AlCl2, SnCl2, ZnCl2) that is formed. This will allow you to calculate the mass of chlorine that reacted as well as the mass ratio between the metal and chlorine.
In this experiment, we use the unknown metal (which is Magnesium, Aluminum, Tin, or Zinc) to react with hydrochloric acid. Base on the mass of the unknown metal and the mass of residue to figure out what element is the unknown metal. By using stoichiometry, the
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