Question

50 баллов за ответ!!! S стрелка H2S стрелка Na2S стрелка FeS стрелка H2S стрелка PbS​

Answer 1

S+H2=H2S

H2S+2NaOH=Na2S+2H2O

Na2S+FeCl2=FeS+2NaCl

FeS+2HNO3=Fe(NO3)2+H2S

H2S+PbCl2=2HCl+PbS

Answer 2

Chemical Reactions in the Given Sequence

The given sequence of chemical reactions is as follows:

S → H2S → Na2S → FeS → H2S → PbS

Let's break down each reaction and explain what is happening in each step.

1. S → H2S: - In this reaction, sulfur (S) reacts with hydrogen gas (H2) to form hydrogen sulfide gas (H2S). - The balanced chemical equation for this reaction is: S + H2 → H2S.

2. H2S → Na2S: - In this reaction, hydrogen sulfide gas (H2S) reacts with sodium hydroxide (NaOH) to form sodium sulfide (Na2S) and water (H2O). - The balanced chemical equation for this reaction is: H2S + 2NaOH → Na2S + 2H2O.

3. Na2S → FeS: - In this reaction, sodium sulfide (Na2S) reacts with iron(II) chloride (FeCl2) to form iron(