When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water the sodium ions are exchanged with
$1.H^{+}$ ions
$2.Ca^{2 +}$ ions
$3.S{{O}_{4}}^{- 2}$ ions
$4.Mg^{2 +}$ ions

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When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water the sodium ions are exchanged with 1.H^ + ions 2.Ca^ 2 + ions 3.S O _ 4 ^ - 2 ions 4.Mg^ 2 + ions

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Correct answer: A. 2, 4

N a _ 2 A l _ 2 S i _ 2 O _ 8 . x H _ 2 O (zeolite) is written as N a _ 2 Z. In it Na^ + ions exchange Ca^ + and Mg^ 2 + ions of hard water to remove permanent hardness of water as follows N a _ 2 Z + Mg^ 2 + → 2Na^ + + MgZ N a _ 2 Z + Ca^ 2 + → 2Na^ + + CaZ

When zeolite, which is hydrated sodium aluminium silicate, is...

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