The carbonates get more soluble as you go down Group 1, but tend to get less soluble down Group 2. 1 GROUP -1 ( ALKALI METALS) 1. 3.Very soluble in water. The carbonates of alkali metals are stable towards heat. All other carbonates are insoluble. Harder to decompose on heating than most other metal nitrates. 4. You don't have any way to eliminate it. 3. 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. Explaining the trends in Group 2 was difficult enough. Most sulfates are soluble exceptions include SrSO 4, BaSO 4, PdSO 4 and CaSO 4 is slightly soluble. D is very nasty. That does C in. 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. (ii) Carbonates. solubility : Nitrates of group -1 and group-2 metals are all soluble in water. All carbonates are insoluble except those of the Group 1 elements and NH The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. Thermal stability. The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. White crystalline solids with general formula MNO. !Lithium is the smallest of the alkali metals and has the highest charge density. They only decompose as far as the nitrite (MNO. 2KNO. Group 1 nitrates. Nitrate is a polyatomic ion with the chemical formula NO − 3. All nitrates are soluble. That eliminates B All column 1 compounds are soluble. Thermal stability. 2)E.g. SO4-2 All sulfates are soluble except: Ag2SO4, PbSO4, Hg2SO4, CaSO4, SrSO4, and BaSO4. However, carbonate of lithium, when heated, decomposes to form lithium oxide. The solubilities of these salts further increase on descending the group. !Thermal decomposition of ionic nitrates gives nitrites, but more covalent lithium nitrate decomposes to the oxide, similar to lead(II) nitrate. † Lithium compounds tend to be more covalent than comparable alkali metal compounds. 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 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. (ii) Carbonates. The reason for low solubilities of strontium and barium nitrates seems to be similarity in size of Ba2+, Sr2+, and NO3- ions. All column 1 and Ammonium ion are soluble. Solubility. CO3-2 The carbonate of Group 1 metals and (NH4)2CO3 are soluble. 2. Solubility. OH-1 The hydroxides of Group 1 metals, and the heavier Group 2 (C is Not the answer). (ii) Carbonates Thermal stability The carbonates of alkali metals are stable towards heat. That lets out A Rule 1 says the nitrates are all soluble. Salts containing this ion are called nitrates.Nitrates are common components of fertilizers and explosives. Solubility Rules and Common Ions Solubility Rules NO3-1 All nitrates are soluble. But two metals as reactive as K and Ba won't combine by ionization. The carbonates of alkaline earth metals also decompose on heating to form oxide and carbon dioxide. 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. 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. Cl-1 All chlorides are soluble except: AgCl, PbCl2, and Hg2Cl2. 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