Why does the mixture fizz when magnesium carbonate is added to hydrochloric acid?

Answer 1

A chemical reaction occurs which results in Carbon Dioxide being produced - the gas creates the fizzing.

The chemical equation for this reaction is:

MgCO3 (s) + 2HCl (aq) --> MgCl2 (aq) + CO2 (g) + H2O (l)

Answer 2

this is due to the whole reaction concept. In more detail, a displacement reaction is taking place where the chloride ions is reacting with the magnesium metal, thus the hydrogen gas formed. due to the hydrogen formation fizzing takes place.

Answer 3

A reactive metal reacts with acid to form a salt and hydrogen gas. This is a type of neutralisation reaction. Hydrochloric acid produces chloride salts.

In this case: Magnesium + hydrochloric acid --> magnesium chloride + hydrogen

As a symbol equation: Mg + HCl --> MgCl2 + H2

Balancing (ensure the same number of atoms are present on both sides of the arrow):

Mg + 2HCl --> MgCl2 + H2

Observations that tell you a chemical reaction is taking place, i.e. new substances are formed: bubbling or fizzing to indicate a gas is produced and the disappearance of the metal. Since the salt in soluble in water the metal will appear to dissolve away to nothing. Also, the reaction is exothermic so the temperature will increase.

Answer 4

Chemical Change because a gas was release when they were mixed together.

Answer 5

carbon dioxide is produced so it fizzes