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# How does the solubility of hydroxides of the alkaline earth metals change when we move from Be to Ba?

Last updated date: 21st Mar 2023
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Hint :Alkaline earth metals elements of group 2 in the periodic table. The elements include beryllium $\left( {Be} \right),\;$ magnesium $\left( {Mg} \right),\;$ calcium $\left( {Ca} \right),\;$ strontium $\left( {Sr} \right),\;$ barium $\left( {Ba} \right),$ and radium $\left( {Ra} \right).$ . They are called alkaline earth metals because of two reasons: first Their oxides remain in the crust of the earth and are water soluble and second is that they are very heat-stable.
$Be{(O\;H)_2} < \;Mg{(O\;H)_2} < \;Ca{(O\;H)_2}\; < \;Sr{(O\;H)_2}\; < \;Ba{(O\;H)_2}$
Metal hydroxides are strong bases. Some of them are weak electrolytes as they are partially soluble in water. Alkaline earth metals hydroxides are also basic. Alkaline earth metals have numerous uses: for manufacturing of alloys, $Mg{(O\; H)_2}$ is used as an antacid in medicine, radium for the treatment of cancer, etc.