The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. Electronic configuration : ns1 ... Their solubility increases down the group since their lattice energy decreases more rapidly than their ... iii) Hydroxides, carbonates and nitrates of both Li and Mg decomposes on heating to yield respective oxide 2LiOH Li 2 O + H 2 O The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. The carbonates of alkali metals are stable towards heat. Thermal stability. However, carbonate of lithium, when heated, decomposes to form lithium oxide. The solubilities of these salts further increase on descending the group. OH-1 The hydroxides of Group 1 metals, and the heavier Group 2 Solubility Rules and Common Ions Solubility Rules NO3-1 All nitrates are soluble. solubility : Nitrates of group -1 and group-2 metals are all soluble in water. The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. SO4-2 All sulfates are soluble except: Ag2SO4, PbSO4, Hg2SO4, CaSO4, SrSO4, and BaSO4. Nitrate is a polyatomic ion with the chemical formula NO − 3. 2)E.g. group. D is very nasty. CO3-2 The carbonate of Group 1 metals and (NH4)2CO3 are soluble. That lets out A Rule 1 says the nitrates are all soluble. Nitrates of both group 1 and group 2 metals are soluble in water. All other carbonates are insoluble. That eliminates B All column 1 compounds are soluble. Explaining the trends in Group 2 was difficult enough. All nitrates are soluble. Thermal stabilities of nitrates of group-1 and group-2 metals increase on moving down the group from top to bottom. However, carbonate of lithium, when heated, decomposes to form lithium oxide. !Lithium is the smallest of the alkali metals and has the highest charge density. The majority of compounds formed by group II elements are ionic.The balance between the attraction of oppositely charged ions to one another and the attraction of separate ions to water dictates the solubility of ionic compounds. All chlorides are soluble except AgCl, Hg 2 Cl 2 and PdCl 2. (ii) Carbonates. All column 1 and Ammonium ion are soluble. Group 1 nitrates. Salts containing this ion are called nitrates.Nitrates are common components of fertilizers and explosives. Cl-1 All chlorides are soluble except: AgCl, PbCl2, and Hg2Cl2. Water solubilities of group 2 nitrates at 0C in g/100gH2O are: Be(NO3)2 "very soluble," Mg(NO3)2 223, Ca(NO3)2 266, Sr(NO3)2 40, Ba(NO3)2 5. !Thermal decomposition of ionic nitrates gives nitrites, but more covalent lithium nitrate decomposes to the oxide, similar to lead(II) nitrate. Harder to decompose on heating than most other metal nitrates. 2KNO. Comparing them with Group 1 is going to be even more difficult - particularly in the case of the carbonates, because the trends in the two Groups are in opposite directions. Almost all inorganic nitrates are soluble in water.An example of an insoluble nitrate is Bismuth oxynitrate.Removal of one electron yields the nitrate radical, also called nitrogen trioxide NO Solubility Nitrates of both group 1 and group 2 metals are soluble in water. Nitrates of both group 1 and group 2 metals are soluble in water. † Lithium compounds tend to be more covalent than comparable alkali metal compounds. The reason for low solubilities of strontium and barium nitrates seems to be similarity in size of Ba2+, Sr2+, and NO3- ions. That does C in. SOLUBILITY RULES 1. 3.Very soluble in water. 3. The carbonates of alkali metals are stable towards heat. They only decompose as far as the nitrite (MNO. (ii) Carbonates. You don't have any way to eliminate it. 4. All carbonates are insoluble except those of the Group 1 elements and NH White crystalline solids with general formula MNO. 3 (s) 2KNO 2 (s) + O 2 (g)Like with the carbonates of group 1, lithium nitrate is the exception behaving as most other nitrates. 1 GROUP -1 ( ALKALI METALS) 1. The carbonates get more soluble as you go down Group 1, but tend to get less soluble down Group 2. (C is Not the answer). Thermal stability. 2. But two metals as reactive as K and Ba won't combine by ionization. (ii) Carbonates Thermal stability The carbonates of alkali metals are stable towards heat. However, carbonate of lithium, when heated, decomposes to form lithium oxide. Solubility. Solubility. Most sulfates are soluble exceptions include SrSO 4, BaSO 4, PdSO 4 and CaSO 4 is slightly soluble. The heavier group 2 metals are stable towards heat strontium and barium nitrates seems be! 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