Answer:
Turns blue litmus paper red
Step-by-step explanation:
Aluminium sulphate Al₂(SO₄)₃ is a water soluble salt. It dissolving in water in an exothermic process to form an acidic solution. Solid aluminium sulfate could have a corrosive effect on metals, while aluminium sulfate in aqueous form has a pH lower than 7
Due to its acidic nature, aluminium sulfate can be added to garden soil to reduce its pH by forming dilute sulfuric acid, H₂SO₄ and crystals of aluminium hydroxide, Al(OH)₃.