Which of the following compounds is a weak electrolyte? a. nabr b. hbr c. koh d. nh3

Answer : The correct answer is D. NH₃

Weak electrolytes :

These are electrolytes which do not completely ionize in aqueous solution . They undergo partial ionization (generally 1% - 10% ) unlike strong electrolytes 100% .

Generally weak acid and weak bases are weak electrolytes . They have low solubility in aqueous solutions . Example : CH₃COOH , NH₃ etc.

Checking all the options :

A ) NaBr :

NaBr is made of Na which is a metal and Br is non metal . Metal and non metal forms an ionic compound . Ionic compound have high solubility in aqueous solutions , They completely dissolves to give their ions ,

Hence NaBr is not a weak electrolyte .

B) HBr :

HBr is strong acid ( Given in image attached ) . Also it is an ionic compound . Hence it is not an weak electrolyte .

C) KOH :

KOH is again an ionic compound which has ions K⁺ and OH⁻ . Also It is strong base ,( given in image attached ) . Hence it is not an weak electrolyte.

D) NH₃ :

NH₃ is made of N and H , both are non metals . Two or more non metals form a covalent compound . Covalent compound do not produce ions and they have low solubility in aqueous solutions .

Hence it will not dissolve in aqueous solutions . So NH₃ is a WEAK ELECTROLYTE.

Hence D) NH₃ is a weak electrolyte.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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