Question

When a piece of magnesium ribbon is placed into beaker containing hydrochloric acid bubbling is observed,which change is it chemical or phyisical

Answer 1

Answer:

When a piece of Magnesium ribbon is placed into a beaker containing Hydrochloric Acid, bubbling is observed. This is due the chemical change between the ions of both the chemicals.

Detailed Explaination:-

• When we add a Mg+² ribbon in HCl, Hydrogen Bubbles can be seen coming out from the reaction of the chemicals.
• In this reaction, Hydrogen is replaced by Magnesium as Magnesium is more reactive than Hydrogen.
• This reaction is known as the Displacement Reaction.
• The equation will be :

$HCl \: (aq) \: + \: Mg (s) \: = > \: MgCl2 \: + \: H 2$

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About Physical Changes:-

• Physical Changes are the changes which are observed when any object is changed physically but it is not changed chemically. This change can be reversed.
• Examples:-

1. Convertion of Water into it's solid (Ice), liquid (Water) and gaseous (Water Vapour).
2. Strecthing a Rubber Band.