Question

(A) What happens when acids are added to the following? Give equations for each of the following.
1) Metals
2) Metal oxides
3) Basic Hydroxides.​

Answer 1

Answer:

Note that the reaction between a metal hydroxide and an acid can be represented by an ionic equation between the hydrogen ions and the hydroxide ions to form water molecules. Also note that the reaction of metal hydroxides with acids is exothermic (ie heat energy is given out).

Answer 2

Answer:

When an acid reacts with a metal, then a salt and hydrogen gas are formed.

   Zinc (A metal)Zn(s)+Hydrochloric acid (Dilute)2HCl→Zinc chloride (A salt)ZnCl2+HydrogenH2(g)

(b) Hydrogen gas is liberated when an acid reacts with a metal. When the reaction between an acid and a metal occurs, we observe the formation of gas bubbles. When these gas bubbles are passed through soap solution, gas-filled soap bubbles rise into the air. 

When a burning candle is brought near a gas-filled soap bubble, the gas present in the soap-bubble burns with a 'pop' sound. Only hydrogen gas burns making a 'pop' sound. This shows that hydrogen gas is evolved in the process. 

Explanation:

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