Question

Complete the following reactions (See Lesson 7)
(i) Sn (s) + 2 NaOH (aq) + H2O (2) → ?
(ii) Fe (s) + XH2O + 3O2 → ?
(iii) Cu (s) + AgNO3 (aq) → ? + ?
Hot
(iv) 2 HgS (s) + 3O2(g) −−−−→ ? + ?

Answer 1

hope it's clear..........

Answer 2

Answer :

(i) $Sn(s)+2NaOH(aq)+H_2O(l)\rightarrow Na_2[Sn(OH)_4](aq)+H_2(g)$

It is single replacement reaction in which the more reactive element replace the less reactive element.

(ii) $4Fe+3O_2+6H_2O\rightarrow 2FeO_3.3H_2O$

It is synthesis reaction in which the multiple substances or reactants combine to form a single product.

(iii) $Cu(s)+AgNO_3(aq)\rightarrow CuNO_3(aq)+Ag(s)$

It is single replacement reaction.

(iv) $2HgS+3O_2\rightarrow 2HgO+2SO_2$

It is a oxidation-reduction reaction in which the electrons are transferred between the two species.