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Reactions properties of the substance's properties of products

Reaction1: magnesium A small piece of a silvery metal small bubbles are seen
plus, hydrochloric acid (magnesium) and a container accumulating on the
of clear hydrochloric acid. metal strip.
Reaction 2: Vinegar and baking soda.
A clear liquid (vinegar) and a white powder (baking soda).
A white precipitates forms (A powdery substance that settles to the bottom)
Reaction 3: Silver nitrate and sodium chloride.
Two clear liquids: silver nitrate solution and sodium chloride solution.
A white precipitates form (a powdery substance that settles to the bottom)

Write a detailed "IF -THEN" hypothesis statement for ONE of the experiments above

1 answer

IF-THEN Hypothesis Statement for Reaction 1:

IF a small piece of magnesium metal is added to hydrochloric acid, THEN the reaction will produce bubbles of hydrogen gas, resulting in effervescence, and the magnesium will dissolve in the acid, forming magnesium chloride, which is observable through the visual change of the metal strip as it reacts.

Explanation of the Hypothesis:

  • Independent Variable: Addition of magnesium metal to hydrochloric acid.
  • Dependent Variable: Presence of bubbles (hydrogen gas) and the observable change in the magnesium metal.
  • Underlying Assumptions: The reaction will occur because magnesium is reactive with hydrochloric acid, and the production of hydrogen gas indicates a chemical reaction is taking place. The magnesium's physical appearance will change as it dissolves, supporting the hypothesis.