Question

Equal length of magnesium ribbon is taken in 2 test tube A &B H2so4 is added to test tube A and h2co3 is added to test tube B in equal amount
(1)Identify the test tube showing vigorous reactions .
(2) name the gas elaborated in both test tube . How will you prove it Elaboration
(3) write the chemical reaction of both reaction.
(4) Out of these two acidss which have lower H+ concentration?

Answer 1

Answer:

H

2

SO

4

test tube i.e A will show more rigorous reactions

b) Since acidic strength of H

2

SO

4

is more than H

2

CO

3

c) Mg+H

2

SO

4

→MgSO

4

+H

2

(g)

Mg+H

2

CO

3

→MgCO

3

+H

2

(g)

The liberated gas is H

2

and it burns with popping sound.

d) Mg+H

2

SO

4

→MgSO

4

+H

2

(g)

Mg+H

2

CO

3

→MgCO

3

+H

2

(g)

e)

i) Since H

2

SO

4

is more acidic, it will have lower pH value.

ii) Test tube B will have lower H

+

concentration as H

2

CO

3

is a weak acid.