What is produced when an acid reacts with a metal

Asked by admin @ 03/08/2021 in Chemistry viewed by 361 People

(a) What happens when an acid reacts with a metal? Give chemical equation of the reaction involved.

(b) Which gas is usually liberated when an acid reacts with a metal? How will you test for the presence of this gas?

Answered by admin @ 03/08/2021

Answer:

[a] When acids react with metals, they produce a salt and hydrogen gas. ... The general equation that describes the chemical reaction between an acid and metal is metal + acid = salt + hydrogen gas.

2HCL +Mg--->MgCl2+H2

[b] when an acid reacts with an active metal HYDROGEN gas is liberated.

EXCEPTION - acids does not react with element bellow hydrogen in activity series of metals to give hydrogen because such metals cannot displace hydrogen from the acid

EXAMPLE -

Zn + H2SO4 ------> ZnSO4 + H2

TEST -

1)Burning wooden splinter is extinguished in hydrogen

2)hydrogen burns with a pale blue flame producing pop sound.

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