classify the following salts as acidic , basic or neutral and name the acids and bases from which they are obtained sodium carbonate sodium chloride ammonium chloride sodium acetate potassium sulphate ammonium sulphate potassium nitrate copper sulphate calcium sulphate
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Sodium Carbonate - Sodium carbonate (also known as washing soda or soda ash), Na2CO3 is a basic salt formed by the reaction between H2CO3 (Carbonic acid) and Sodium hydroxide (Na OH). H2CO3 +2 Na OH → Na2CO3 +2H2O
Since Carbonic acid is a weak acid and caustic soda is a strong base, therefore the salt formed by their reaction is a basic salt
Sodium Chloride - A salt that is derived from the reaction of a strong acid with a strong base forms a solution that has a pH of 7. An example is sodium chloride, formed from the neutralization of H Cl by Na OH. Neither, It is a neutral salt.
Ammonium Chloride - Ammonium chloride (chemical formula NH4Cl) is an acidic salt since it is a salt of a strong acid, namely hydrochloric acid.
Sodium Acetate - Sodium acetate is a basic salt; the acetate ion is capable of deprotonating water, thereby raising the solution's ph. It is also called Acetic acid.
Potassium Sulphate - Potassium sulphate (chemical formula K2SO4) is prepared by the action of potassium hydroxide (KOH) and sulphuric acid (H2SO4). Since both the acid and the base forming the salt are strong, therefore potassium sulphate is a neutral salt.
Ammonium Sulphate - This salt is made of weak base ammonium hydroxide and strong acid sulphuric acid. When dissolved in water, it undergoes anionic hydrolysis ( as ammonium ion is strong acid) hence nature of the solution is alkaline.
Potassium Nitrate - KNO3 is completly ionized in water giving the Nitric acid which is strong acid with very low Ka and Potassium hydroxide which is very stron base and alkaline with Low Kb. And hence the salt is Neutral.
Copper Sulphate - Copper sulphate is a salt of a strong acid, H2SO4, and a weak base, Cu(OH)2. So, in aqueous solution, the Cu2+ ions undergo hydrolysis as follows: Cu(2+) + H2O = CuOH(+) + H(+) .The release of H+ ions by hydrolysis makes the solution distinctly acidic.
Calcium Sulphate - CaSO4,Calcium Sulphate. The salt is formed by weak base and strong acid,so it is acidic in nature.Aqueous solution of Calcium Sulphate is neutral as it does not undergo cation or anion hydrolysis to yield acidic or basic solution . It is a salt of a strong acid ( H2SO4) and strong base ( Ca(OH)2 ).