Row NH4+: NH4NO3, (NH4)2SO4, (NH4)3PO4. Row Li+: LiNO3, Li2SO4, Li3PO4. Row Al3+: Al(NO3)3, Al2(SO4)3, AlPO4. Row Cu2+: Cu(NO3)2, CuSO4, Cu3(PO4)2. Each entry balances the positive and negative charges of the combining ions.
Complete the Table 9.3 by writing the formulae of the compounds formed by the cations on the left and the anions at the top. LiNO3 is given as an example. Cations: NH4+, Li+, Al3+, Cu2+ Anions: NO3-, SO4 2-, PO4 3-
Share
For ammonium ion, the compounds formed are ammonium nitrate NH4NO3, ammonium sulfate (NH4)2SO4 and ammonium phosphate (NH4)3PO4. For lithium ion, the compounds are lithium nitrate LiNO3, lithium sulfate Li2SO4 and lithium phosphate Li3PO4. For aluminium ion, they are aluminium nitrate Al(NO3)3, aluminium sulfate Al2(SO4)3 and aluminium phosphate AlPO4. For copper(II) ion, they are copper(II) nitrate Cu(NO3)2, copper(II) sulfate CuSO4 and copper(II) phosphate Cu3(PO4)2.
For more NCERT Solutions of Class 9 Science Exploration Chapter 9 Atomic Foundations of Matter Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-9/