QUESTION 1. Which of the following compounds are electrolytes and which are not? KNO3, H2O, NaHCO3,...

QUESTION 1. Which of the following compounds are electrolytes and which are not?

KNO₃, H₂O, NaHCO₃, HBr, NH₃

QUESTION 2. Write the balanced chemical equation that show the dissociation of the ions in aqueous solution for the electrolytes you identify in question 1. Example: KCl (s) = K + (aq) + Cl - (aq)

Solutions

Expert Solution

(1) An electrolyte is a chemical substance that form ions when they placed in a solvent.

Among the given solutes, KNO3, HBr, NH3 and NaHCO3 are electrolytes.

KNO3 and HBr are strong electrolytes.

NH3 and NaHCO3 are weak electrolyes.

H2O (pure water) is a non electrolyte.

(2) The dissociation of given electrolytes can be written as,

KNO3(aq) K+(aq) + NO3-(aq)

KNO3 completely dissociates in aqueous solution to give K+ and NO3-.

HBr(aq) H+(aq) + Br-(aq)

HBr is a strong acid and hence dissociates completely.

NH3(aq) + H2O(l) NH4+(aq) + OH-(aq)

Ammonia is a weak base and hence it will not dissociates completely in aquous solution.

NaHCO3(aq) + H2O(l) Na+(aq) + HCO3-(aq)

NaHCO3 is a weak base.

queen_honey_blossom answered 1 year ago

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