Question

Which of the following weak electrolytes?
(A) $$NaHC{O}_3$$
(B) Oxalic acid
(C) $$N{H}_{4}OH$$
(D) All of these

Answer 1

Hint: The strong electrolytes are defined as the electrolyte which get dissociated into the solution complete. The weak electrolyte is defined as the electrolyte which dissociates into the solution partially. The base which has the tendency to donate the hydroxide ion easily is weak. Examples of strong electrolyte are potassium hydroxide and sodium hydroxide and weak electrolyte are acetic acid.

Complete step-by-step answer:the $$NaHC{O}_3$$is considered to be a weak electrolyte because it dissociates partially in the solution. The dissociation for$$NaHC{O}_3$$is the following:
$$NaHC{O}_{3}N{a}^{+}+HC{O_3}^{-}$$
The oxalic acid also remains undissociated in the solution due to which it is referred to as weak electrolyte. It has high molecular weight. It also exists as a dimer in solution and is a highly unstable compound. It also has low ionization energy and is also a weak acid. The dissociation equation for oxalic acid is the following:
$$H_2{C}_2{O}_4{H}^{+}+C_2{O_4}^{-}$$
The ammonium hydroxide is considered as a weak electrolyte because it get partially dissociated in the aqueous solution. The dissociation constant for ammonium hydroxide is1.76 and pH value is 11.6. the dissociation equation for ammonium hydroxide is the following :
$$N{H}_{4}OHN{H_4}^{+}+O{H}^{-}$$

As all the three compounds given are weak electrolyte so the correct answer is option (D).

Note: Sodium bicarbonate is used as acid ingestion. It is referred to as baking soda and used as an antacid which relieves heartburn. Oxalic acid is used as an acid rinse in laundry to remove stains as it has the ability to convert most insoluble iron compounds into soluble ion. ammonium hydroxide is used as a cleaning agent and sanitizers. It is used in manufacturing of fertilizers and plastic.