IF-THEN Hypothesis Statement for Reaction 1: Magnesium plus Hydrochloric Acid
IF a small piece of magnesium metal is added to hydrochloric acid, THEN bubbles of hydrogen gas will form around the magnesium strip, indicating a chemical reaction is taking place. This is because the magnesium reacts with the hydrochloric acid to produce magnesium chloride and hydrogen gas, which is visible as the small bubbles accumulating on the metal strip.
Explanation of Other Reactions:
Reaction 2: Vinegar and Baking Soda
This was a chemical reaction because when vinegar (an acid) combines with baking soda (a base), it produces carbon dioxide gas, which is what causes the bubbling and foaming. The formation of gas indicates a new substance is formed.
Reaction 3: Silver Nitrate and Sodium Chloride
This was also a chemical reaction because when silver nitrate solution and sodium chloride solution are mixed, they undergo a reaction that produces silver chloride, which forms as a white precipitate. The formation of a solid from two liquids indicates that a chemical change has occurred.