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write the names of the following compounds. 1) iron + sulphur . 2) manganese + oxygen. aluminium + sulphur​

Sagot :

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Answer:

  1. FeS
  2. MnO₂
  3. Al₂S₃

Explanation:

1) Iron + Sulphur = ?

→ Iron sulfide

2) Manganese + Oxygen = ?

→ Manganese dioxide

3) Aluminium + Sulphur = ?

→ Aluminium sulfide

#1

  • Ferrous shows variable valency as it's transitive metal.

#For valency=2

[tex]\\ \rm\Rrightarrow {Fe(II)\atop Iron}+{S\atop Sulphur}\longrightarrow {FeS\atop Pyrrhotite}[/tex]

#For valency=3

[tex]\\ \rm\Rrightarrow {Fe(III)\atop Iron}+{S\atop Sulphur}\longrightarrow {Fe_2O_3\atop Sesquisulfide}[/tex]

#2

  • Manganese also shows variable valency

#For valency=2

[tex]\\ \rm\Rrightarrow {Mn(II)\atop Manganese}+{O_2\atop Oxygen}\longrightarrow {MnO_2\atop Manganese (II) Oxide}[/tex]

#For valency=4

[tex]\\ \rm\Rrightarrow {Mn(IV)\atop Manganese}+{O_2\atop Oxygen}\longrightarrow {MnO_4\atop Permanganate}[/tex]

#3

[tex]\\ \rm\Rrightarrow {Al\atop Aluminium}+{S\atop Sulphur}\longrightarrow {Al_2S_3\atop Aluminium\:Sulphide}[/tex]

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