Which of the following aqueous solution will have pH less than 7.0?

Question

Which of the following aqueous solution will have pH less than 7.0? (A)  textKNO text3 (B)  textNaOH (C)  textFeCl text3 (D)  textNaCN

Tardigrade Admin · Accepted Answer

textFeCl text3 is a salt of weak base, ( textFe(OH)) text3 and strong acid, textHCl , so textFeCl text3 solution is acidic in nature. In other words, textFe text3+ hydrolyze, but textCl- does not. <img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-s1jbuvmqwksq.png" />

Q. Which of the following aqueous solution will have pH less than 7.0?

$KNO_{3}$

$NaOH$

$FeCl_{3}$

$NaCN$

$FeCl_{3}$ is a salt of weak base, $(Fe(OH))_{3}$ and strong acid, $HCl$ , so $FeCl_{3}$ solution is acidic in nature. In other words, $Fe^{3+}$ hydrolyze, but $Cl^{-}$ does not.

Q. Which of the following aqueous solution will have pH less than 7.0?

KNO3​

NaOH

FeCl3​

NaCN

FeCl3​ is a salt of weak base, (Fe(OH))3​ and strong acid, HCl , so FeCl3​ solution is acidic in nature. In other words, Fe3+ hydrolyze, but Cl− does not.

$KNO_{3}$

$NaOH$

$FeCl_{3}$

$NaCN$

$FeCl_{3}$ is a salt of weak base, $(Fe(OH))_{3}$ and strong acid, $HCl$ , so $FeCl_{3}$ solution is acidic in nature. In other words, $Fe^{3+}$ hydrolyze, but $Cl^{-}$ does not.