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Definition of Al2S7
Al2S7, or aluminium sulfide(VII), is a chemical substance belonging to the group of metal sulfides, which can be formed from the reaction between aluminum and sulfur.
1.1 Names
1.1.1 Common name: Aluminium sulfide(VII)
1.1.2 English name: Aluminium sulfide
1.2 Atomic mass: 306.07 g/mol
1.3 Atomic structure
1.3.1 Molecular structure: The Al2S7 molecule consists of two aluminium atoms and seven sulfur atoms.
1.4 Ion structure: Al2S7 forms Al3+ and S2- ions after ionization. -
Properties of Al2S7
2.1 Physical properties of Al2S7
State: Solid in standard conditions
Color: Black
Smell: No distinctive smell
PH: Not applicable in the solid state
2.2 Chemical properties of Al2S7: Colorless solid, insoluble in water, reacts strongly with water to form hydrogen sulfide, a gas with a distinctive foul smell.
- Common chemical equations of Al2S7
Reaction with water: Al2S3 + 6H2O -> 2Al(OH)3 + 3H2S
Reaction with acid: Al2S3 + 6HCl -> 2AlCl3 + 3H2S
Reaction with base: Al2S3 + 6NaOH -> 2Na3AlO3 + 3H2S - Synthesis of Al2S7
4.1 Laboratory synthesis of Al2S7: By heating aluminum with sulfur.
2Al + 3S -> Al2S3
4.2 Industrial synthesis of Al2S7: Not synthesized on an industrial scale due to the toxic nature of hydrogen sulfide.