Question

3. Write down the physical states of reactants and products in following reactions.
a. SO2 + 2H2S → 3S + 2H20
b. 2Ag + 2HCl
2AgCl + H2​

Answer 1

Answer:

$SO_{2}$ (g) + 2 $H_{2} S$ (g) → 3 S (s) + 2 $H_{2} O$ (l)

2 Ag (s) + 2HCl (aq) → ***NO REACTION***

2 AgCl (aq) + $H_{2}$ (g) → 2 Ag (s) + 2 HCl (aq)

remark: reaction 2 and 3 are using so called opposite reactants, Since $H_{2}$ is more reactive than Ag , $H_{2}$ can displace Ag from solution but can't do it in reversed way