Firstly, I apologize for the mistake in the chemical formula you provided. There is no chemical substance with the formula Al2S15. You might be referring to Al2S3 – aluminium sulfide, also known as aluminum sulfide.
- Definition of Al2S3:
1.1 Common name: aluminium sulfide, aluminum sulfide
1.2 English name: aluminium sulfide
1.3 The atomic mass of Al2S3 is 150.158 g/mol.
1.4 Each Al2S3 molecule consists of 2 aluminium atoms and 3 sulfur atoms.
1.5 In Al2S3, aluminium and sulfur are combined in the form of ions, with aluminium as the positive ion Al3+ and sulfur as the negative ion S2-.
- Properties of Al2S3:
2.1 Physical properties: Al2S3 is a pale yellow or white solid. It has no distinctive smell.
2.2 Chemical properties: Al2S3 easily reacts with water to form Al(OH)3 and H2S; reacts with acid to form AlCl3 and H2S.
- Common chemical equations involving Al2S3:
3.1 Reaction with water: Al2S3 + 6H2O -> 2Al(OH)3 + 3H2S
3.2 Reaction with hydrochloric acid: Al2S3 + 6HCl -> 2AlCl3 + 3H2S
- Preparation of Al2S3:
4.1 Laboratory preparation: Al2S3 can be prepared by burning aluminium in air containing sulfur.
4.2 Industrial preparation: In industry, Al2S3 is usually prepared from aluminium and sulfur at high temperatures.