Question

write a note on Variatio of hydration
enthalpies in alkaline earth metals ​

Answer 1

Explanation:

Acid, any substance that in water solution tastes sour, changes the colour of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, and promotes certain chemical reactions (acid catalysis).

An acid is a molecule or ion capable of donating a proton (hydrogen ion H+) (a Brønsted–Lowry acid), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). ... A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution.

Answer 2

Explanation:

Like alkali metal ions hydration enthalpies of alkaline earth metal ions decrease with increase in ionic size down the group; Be2+ > Mg2+ > Ca2+ > Sr2+ > Ba2+ . Thus compounds of alkaline earth metals are more extensively hydrated than those of alkali metals e.g. MgCl2 and CaCl2 exist as MgCl2.

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