Question

why the position 6. On the basis of the reactions observed in the six test tubes, explain why the hydrogen cannot be fixed exactly with respect to all of the other elements lition dorea sa d oldswoodtode -IV activity series in Question 5. adora sest oss i boto galerisi 7. What additional test(s) would be needed to establish the exact position of hydrogen in activity series of the elements listed in Question 5? Answer the question in full sentenca Divides 8. On the basis of the evidence developed in this experiment: M. (a) Would silver react with dilute sulfuric acid? Why or why not? (b) Would magnesium react with dilute sulfuric acid? Why or why not? - 88 -

Answer 1

answer

6) first we can understand the high reactive metal displace the low reactive metal

Then observe closely in 6 test tube reaction we can identify Ag displaced by Cu.

H and Pb can't be displaced by Cu . There for H and Pb is high reactive than Cu.

Then Pb and H displaced by Zn . But Mg can't be displaced by Zn.

So we can concluded from this reactivity decrease from Mg to Ag

Mg > Zn { H = Pb } > Cu > Ag , we can't predict the exact position of hydrogen and lead also. becouse of no reaction conduct with Pb and H .

7) we can do the additional test for Pb with H.

Taken a test tube with HCl and add a piece of Pb metal. We can obseve hydrogen bubbles. The Pb metals displaced hydrogen in HydroChloric acid . The assumption get from this Pb is reactive than hydrogen.

Pb_(s) + 2HCl_(l) ---------> PbCl_2(l) + H_2(g)

The odero the reactivity series used from the metals in test

Mg > Zn > Pb > H > Cu > Ag

8)

a} Ag + H₂SO₄  --------------> No reaction

Because Ag metal is less reactive than Hydrogen in reactivity series. So Ag can't displace the hydrogen atom in the sulfuric acid.

b} Mg + H₂SO₄ --------------> MgSO₄ + H₂

Mg metal is high reactive than hydrogen. So they can easily displace the hydrogen atom in sulfuric acid . And MgSO₄ is formed, H gas is evolved the reaction.

Reactivity comparison of metals in each test tube

1) Cu > Ag

2) Zn > Pb

3) Zn < Mg

4) Cu < H

5) Zn > Hg

6) Cu < pb