Considering their pKa, we can affirm that PH₃ is a stronger acid than NH₃.
We want to compare the strength of different acids. To do so, we need to compare their pKa.
<h3>What is the pKa?</h3>
The pKa is the negative base 10 logarithm of the acid dissociation constant, Ka.
The lower the pKa, the stronger the acid.
Which comparison is correct?
- HF is a stronger acid than HCI. FALSE. The pKa of HF is 3.1. and the pKa of HCl is 6.0.
- H₂S is a stronger acid than HCI. FALSE. The pKa₁ of H₂S is 7.04. and the pKa of HCl is 6.0.
- PH₃ is a stronger acid than NH₃. TRUE. The pKa of PH₃ is -5.5 and the pKa of NH₃ is 9.9.
- NH₃ is a stronger acid than HF. FALSE. The pKa of NH₃ is 9.9 and the pKa of HF is 3.1.
Considering their pKa, we can affirm that PH₃ is a stronger acid than NH₃.
Learn more about pKa here: brainly.com/question/13608171
