give reason for the following question number 1 zinc sulphate. salt solution turn blue Litmus red
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A solution of potassium chloride has no effect on litmus. This indicates neutral solution. Potassium chloride is a salt of strong acid with strong base. Such salts do not undergo hydrolysis. They give neutral solution.
A solution of zinc chloride turns the blue litmus red. This indicates acidic solution. Zinc chloride is a salt of weak base and strong acid. On hydrolysis, these solutions give acidic solution as hydrogen ion concentration is higher than hydroxide ion concentration.
Zn2+2H 2O→Zn(OH)2+2H+
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