You visited us 1 times! Enjoying our articles? Unlock Full Access!

Bronsted Lowry Theory

H2SO4aq + H2O...

Question

$H_{2} S O_{4} (a q) + H_{2} O (l) ⇌ H_{3} O^{+} (a q) + H S O_{4}^{-} (a q)$
$H C_{2} H_{3} O_{2} (a q) + H_{2} O (l) ⇌ H_{3} O^{+} (a q) + C_{2} H_{3} O_{2}^{-} (a q)$
Analyze the two chemical reactions above.
Which conjugate base is the STRONGEST?

H_{2} O

No worries! We‘ve got your back. Try BYJU‘S free classes today!

H_{3} O^{+}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

H S O_{4}^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C_{2} H_{3} O_{2}^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $H_{3} O^{+}$
$H_{2} S O_{4} (a q) + H_{2} O (l) ⇌ H_{3} O^{+} (a q) + H S O_{4}^{⊝} (a q)$
$H C_{2} H_{3} O_{2} (a q) + H_{2} O (l) ⇌ H_{3} O^{+} (a q) + C_{2} H_{3} O_{2}^{⊝} (a q)$
The weaker the acid the stronger will be its conjugate base. In the above equations, there are three acids i.e. $H_{2} S O_{4}, H C_{2} H_{3} O_{2}$ and $H_{3} O^{+}$ . Now $H_{2} S O_{4}$ is very strong acid. But $H_{3} O^{+}$ is very weak acid $(p K_{a} = 10^{- 14})$ . So conjugate base of $H_{3} O^{+}$ will be strong base comparably.

Suggest Corrections

Similar questions

H_{2} S_{(g)} + {H_{2} O}_{(l)} ⇌ {H_{3} O}_{(a q)}^{+} + {H S^{-}}_{(a q)}

H_{2} O_{(l)} + H_{2} O_{(l)} ⇌ H_{3} O_{(a q)}^{+} + O H_{(a q)}^{-}

H_{2} C_{2} O_{4} (a q) + H_{2} O (l) ⇌ H_{3} O + (a q) + H C_{2} O_{4}^{-} (a q)

H C_{2} O_{4}^{-} (a q) + H_{2} O (l) ⇌ H_{3} O + (a q) + C_{2} O_{4}^{2 -} (a q)

K_{c 1} = 5.9 \times 10^{- 2}

K_{c 2} = 6.4 \times 10^{- 5}

25^{0} C

K_{c}

H_{2} C_{2} O_{4} (a q) + 2 H_{2} O (l) ⇌ 2 H_{3} O + (a q) + C_{2} O_{4}^{2 -} (a q)

H_{2} C_{2} O_{4} (a q) + H_{2} O (l) ⇌ H_{3} O + (a q) + H C_{2} O_{4} - (a q)

H C_{2} O_{5} - (a q) + H_{2} O (l) ⇌ H_{3} O + (a q) + C_{3} O_{4}^{2} - (a q)

K_{c l} = 5.9 \times 10^{- 2}

K_{c 2} = 6.4 \times 10^{- 5}

25^{\circ} C

K_{c}

(3)

H_{2} C_{2} O_{4} (a q) + 2 H_{2} O (l) ⇌ 2 H_{3} O + (a q) + C_{2} O_{4}^{2} - (a q)

H C l

H C l (a q) + H_{2} O \to C l^{-} (a q) + H_{3} O^{+}

Join BYJU'S Learning Program