Describe treatment of phosphate rock with sulfuric acid to produce soluble salts for fertilisers. (Chemistry only)

In the subtopic Production and uses of NPK fertilisers, this learning objective focuses on describe treatment of phosphate rock with sulfuric acid to produce soluble salts for fertilisers. (Chemistry only). Within The Haber process and the use of NPK fertilisers, students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include chemistry only, salt, sulfuric acid, phosphate rock, and soluble salt. phosphate rock means a naturally occurring mineral from which phosphate is extracted, often treated to produce soluble salts for fertilisers. Avoid students often confuse the treatment of phosphate rock with sulfuric acid with its treatment using nitric acid; instead remember that sulfuric acid produces different soluble salts compared to nitric acid. Focus on the specific acids and their respective reactions with phosphate rock. For exam answers, memorize the steps involved in treating phosphate rock with sulfuric acid to produce soluble salts, focusing on the chemical reaction and the resulting products.