PoTA B. Obtain a piece of Magnesium ribbon and place it in a takt be. Placelut o

Question

PoTA B. Obtain a piece of Magnesium ribbon and place it in a takt be. Placelut of 1 M HCl a test tube. Observe carefully. (I) Is a chemical reaction taking place? (2) If you answered yes above, what is the evidence for this reaction? (3) Write the word equation for this reaction. (4) Classify ths reaction as one of the 4 reaction types. (5) Write the balanced chemical equation for this reaction. Include the physical states of the reactants a products. (6) Write the complete ionic equation for this reaction. (7) Write the net ionic equation

Explanation / Answer

(3) Magnesium + Hydrochloric acid gives Magnesium Chloride and Hydrogen

(4) This is an acid-base reaction. Mg is base and HCl is acid. This can also be seen as redox reaction.

(5) Mg (s) + 2HCl (aq) ----> MgCl2(aq) + H2(g)

(6) oxidation redox reaction Mg -----> Mg2+ + 2e-

   reduction redox reaction   2H+ + 2e- -----> H2

(7) adding the two redox reaction in (6) and canceling the electrons, we get the net ionic equation

    Mg + 2H+ -----> Mg2+ + H2

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