Melting points generally decrease down the group this is because they are all metals and hence have metallic bonding which consists positive metal ions surrounded by a sea of delocalised electrons. Solubility of the hydroxides. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This acid gas can however be removed from the flue gases using a group 2 alkali in a process known as wet scrubbing. This is a trend which holds for the whole Group, and applies whichever set of data you choose. which explains the increasing solubility as you go down group 2. Calcium hydroxide is reasonably soluble in water. This page looks at the solubility in water of the hydroxides, sulphates and carbonates of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium. The Chlorine is -1 in the HCl, and -1 in CaCl 2. solubility of group 2 hydroxides ..... down the group. The general fall is because hydration enthalpies are falling faster than lattice enthalpies. Today we're covering: Properties of Group 2 compounds Reactions Oxides with water Carbonates with acid Thermal decomposition Carbonates Nitrates Solubility Hydroxides Sulfates Let's go! Barium carbonate is slightly more soluble than strontium carbonate. Hydroxides: As you go down the group the solubilities of the group 2 hydroxides increase. Group 2 oxides react with water to form a solution of metal hydroxides. . Before I started to write this page, I thought I understood the trends in solubility patterns including the explanations for them. Calcium hydroxide, often known as slaked lime, is used in agriculture to neutralise acidic soil, and magnesium hydroxide is often used in indigestion tables to neutralise excess stomach acid. The hydroxide itself is insoluble in water, with a solubility product log K* sp of −11.7. Please explain the text in bold. All Group II hydroxides when not soluble appear as white precipitates. The reactivity of the group 2 elements increase as you go down the group. This is another example of a redox reaction. Progressing down group 2, the atomic radius increases due to the extra shell of electrons for each element. Chemistry - Group 2 (Solubility of Group 2 hydroxides (In group 2 metals,…: Chemistry - Group 2 When these fossil fuels are burnt, contaminants of sulfur are reacted with oxygen to form sulfur dioxide which if released into the atmosphere can cause acid rain. Although it describes the trends, there isn't any attempt to explain them on this page - for reasons discussed later. Not ALL metal hydroxides are strong bases, and not all strong bases are soluble.Only group 2 hydroxides (LiOH, NaOH, KOH, etc) and three group 2 metal hydroxides … 0. reply. Magnesium hydroxide is virtually insoluble, whereas barium hydroxide will readily dissolve in water. 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