Give equation and indicate briefly, how will you prepare crystals of z

1.	Give equation and indicate briefly, how will you prepare crystals of zinc sulphate from zinc filings ?
Answer» Take about 50 cm³ of dilute sulphuric acid in a beaker and add 5 gm of zinc filings and heat it on a wire gauge with constant stirring. Zinc metal reacts with dilute sulphuric acid to liberate hydrogen gas and zinc sulphate is formed. Zn + H₂SO₄ → ZnSO₄ (Zinc sulphate) + H₂ More zinc filings are added, till dilute sulphuric acid is completely consumed and effervescence of hydrogen stops. Filter the solution to remove undissolved zinc and collect the filtrate in an evaporating dish. Heat the solution till a saturated solution is obtained. Cool the solution to obtain the crystals of zinc sulphate with seven molecules of water of crystallization. ZnSO₄ + 7H₂O → ZnSO₄ .7H₂O (Heptahydrate zinc sulphate)

Give equation and indicate briefly, how will you prepare crystals of zinc sulphate from zinc filings ?

Answer»

Take about 50 cm³ of dilute sulphuric acid in a beaker and add 5 gm of zinc filings and heat it on a wire gauge with constant stirring. Zinc metal reacts with dilute sulphuric acid to liberate hydrogen gas and zinc sulphate is formed.

Zn + H₂SO₄ → ZnSO₄ (Zinc sulphate) + H₂

More zinc filings are added, till dilute sulphuric acid is completely consumed and effervescence of hydrogen stops. Filter the solution to remove undissolved zinc and collect the filtrate in an evaporating dish. Heat the solution till a saturated solution is obtained. Cool the solution to obtain the crystals of zinc sulphate with seven molecules of water of crystallization.

ZnSO₄ + 7H₂O → ZnSO₄ .7H₂O (Heptahydrate zinc sulphate)

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