End-of-chapter questionsi Apart from saving money, why is it important to recycle as many substances as possible?2 A farmer uses slaked lime (Ca(oH),) and ammonium sulfate to increase the fertility of his fieldsa What type of soil might the farmer use lime on?b which essential element will ammonium sulfate add to the soil?c What reaction could take place between slaked lime and ammonium sulfate?Lime (Cao) is manufactured from limestone by heating it strongly.d What is the chemical formula oflimestone?48Cambridge IGCSE Chemistry