in the reaction of magnesium metal with hydrochloric acid, how do you determine when the magnesium metal has reacted completely

The reaction between the acid and the magnesium metal goes into completion when there is no more spark from the magnesium. Also, the magnesium would have totally disappeared into solution.

These physical observation marks the end of the reaction.

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priyankatutor priyankatutor · Answer 2 · 2022-01-18T06:23:43+01:00

When Mg reacts with HCl hydrogen bubbles are released. The completion of the given reaction can be determined by the presence of bubbles above the HCl.

The reaction between HCl and Mg:

[tex]\bold {Mg+ 2HCl\rightarrow MgCl_2 + H_2}[/tex]

In this reaction, Mg reacts with 2 moles of HCl to form 1 mole of Magnesium chloride and release hydrogen gas.

During reaction,

Magnesium slowly disappears as it reacts with HCl.
The hydrogen gas is released during the reaction, bubbles can be observed.

Therefore, the completion of the given reaction can be determined by the presence of bubbles above the HCl.

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