Answer :
Thus 3 moles of ions are released when samples dissolves definitely in water.
Water (H2O) is made from 2 atoms of hydrogen and 1 atom of oxygen. A mole of water molecules would be 2 moles of hydrogen atoms plus 1 mole of oxygen atoms.
On moving down the group lattice energy decreases because of increases in the size of cation. Be(OH)2 is not soluble in water while Ba(OH)2 is highly soluble due to difference in lattice energy.
How many ions are in a mole?
One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The variety 6.022 × 10²³ is acknowledged as Avogadro's number or Avogadro's constant.
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