Give a list of acidic salts.
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According to Arrhenius theory, the acidic compounds tend to release H+ ions in their aqueous solution while a basic substance can release hydroxyl ion in its aqueous solution. The reaction of acid and base produces salts which can be acidic or basic or neutral in nature which depends upon the nature of acid or base. On the basis of strength of acid or base, they can be classify in two types; strong and weak. A strong acid is the one which ionize 100% in their aqueous solution to form hydrogen ions. Sulphuric acid, nitric acid and hydrochloric acid are examples of strong acids.
On the contrary, weak acids cannot ionize completely in the solution such as acetic acid (CH3COOH), formic acid (HCOOH) and oxalic acid (COOH-COOH) etc. The dissociation of acid or base in water is called as hydrolysis process which involves the change in pH of the solution due to change in the concentration of H+ or OH- ion in solution. It can be considered as the reverse reaction of neutralization process such as reaction of ammonium chloride with water results the formation of ammonium hydroxide with hydrochloric acid as given below;
NH4Cl + H2O → NH4OH + HCl
On the basis of pH of the aqueous solution of salts; they can be classified as acidic, basic and neutral salts. An acidic solution shows less pH (less than 7) with water such as aqueous solution of ammonium chloride is acidic in nature; hence it is an example of acidic salt. Since the hydrolysis of this salt results the formation of NH4OH with HCl, here NH4OH is a weak base while HCl is a strong acid. Therefore overall solution would be acidic in nature. The list of acidic salt is very long.
All the salts which are formed due to neutralisation reaction of strong acid with weak base are acidic salts. Another example of acidic salt copper sulphate (CuSO4) which is formed with the reaction of weak base (Cu(OH)2) and strong acid (H2SO4). On the other hand, the pH of basic solution is more than 7; hence they form alkaline solution. Some common examples of basic salts are sodium acetate (CH3COONa), sodium carbonate (Na2CO3) and sodium sulphide (Na2S).
Let’s discuss one example of it. Sodium carbonate is formed with the neutralisation reaction of sodium hydroxide and carbonic acid. In other basic salts give strong base and weak base during hydrolysis. A neutral salt is formed by the reaction between strong acid and strong such as NaCl, KNO3. Any of the salt is an ionic compound which contains at least one spectator ion. Salts dissociate completely in water to form cation and anions.
The spectator ions do not take part in any equilibrium process. Some common spectator anions are Cl-, Br-, I-, NO3- , ClO4- and SO42-. While spectator cation are Li+, Na+, K+, Rb+, Ca2+, Sr2+ and Ba2+.
With the help of aqueous solution of salts we can predict the effect of the cation and effect of the anion on the pH of water with the overall effect. For acidic salts, the value of Ka of the cation would be greater than Kb of the anion while for basic salt the value of Kb would be greater than Ka.
On the contrary, weak acids cannot ionize completely in the solution such as acetic acid (CH3COOH), formic acid (HCOOH) and oxalic acid (COOH-COOH) etc. The dissociation of acid or base in water is called as hydrolysis process which involves the change in pH of the solution due to change in the concentration of H+ or OH- ion in solution. It can be considered as the reverse reaction of neutralization process such as reaction of ammonium chloride with water results the formation of ammonium hydroxide with hydrochloric acid as given below;
NH4Cl + H2O → NH4OH + HCl
On the basis of pH of the aqueous solution of salts; they can be classified as acidic, basic and neutral salts. An acidic solution shows less pH (less than 7) with water such as aqueous solution of ammonium chloride is acidic in nature; hence it is an example of acidic salt. Since the hydrolysis of this salt results the formation of NH4OH with HCl, here NH4OH is a weak base while HCl is a strong acid. Therefore overall solution would be acidic in nature. The list of acidic salt is very long.
All the salts which are formed due to neutralisation reaction of strong acid with weak base are acidic salts. Another example of acidic salt copper sulphate (CuSO4) which is formed with the reaction of weak base (Cu(OH)2) and strong acid (H2SO4). On the other hand, the pH of basic solution is more than 7; hence they form alkaline solution. Some common examples of basic salts are sodium acetate (CH3COONa), sodium carbonate (Na2CO3) and sodium sulphide (Na2S).
Let’s discuss one example of it. Sodium carbonate is formed with the neutralisation reaction of sodium hydroxide and carbonic acid. In other basic salts give strong base and weak base during hydrolysis. A neutral salt is formed by the reaction between strong acid and strong such as NaCl, KNO3. Any of the salt is an ionic compound which contains at least one spectator ion. Salts dissociate completely in water to form cation and anions.
The spectator ions do not take part in any equilibrium process. Some common spectator anions are Cl-, Br-, I-, NO3- , ClO4- and SO42-. While spectator cation are Li+, Na+, K+, Rb+, Ca2+, Sr2+ and Ba2+.
With the help of aqueous solution of salts we can predict the effect of the cation and effect of the anion on the pH of water with the overall effect. For acidic salts, the value of Ka of the cation would be greater than Kb of the anion while for basic salt the value of Kb would be greater than Ka.
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some acid salts are and H2 cl2 H2 S o4 pbno32 nanh2 so4 H2O nahso4 aqua solution
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