what happens where a metal reacts with an acid?
Answers
Explanation:
Acids react with most metals and, when they do, a salt is produced. But unlike the reaction between acids and bases, we do not get water. It doesn't matter which metal or which acid is used, if there is a reaction we always get hydrogen gas as well as the salt.
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(a) 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)
ZnCl
2
+
Hydrogen
H
2
(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.