In this blog we are going to tell you about Arrange the following aqueous solutions, all at 25° C, in order of decreasing acidity, so read this blog carefully to get the complete information.
Rank from most acidic to most basic. To rank items as equivalent, overlap them.
Answer: Rank from most acidic to most basic is 0.0023 M HCl pH = 5.45 and pOH = 8.550.0018 M KOH.
Answer Explanation:
In this question, options are missing. Options are pOH = 8.55, pH= 5.45 0.0023 M HCl 0.0018 M KOH. As we have to rank these solutions, we have to first calculate either pH or pOH of these solutions. We will use pH as an indicator to rank these solutions. As you may know, the relation between pH and pOH is pH + pOH = 14.
For pOH = 8.55, use equation A, we will get-
pH + 8.55 = 14
pH = 5.45
For 0.0023 M HCl, HCl is a strong acid so it will ionize 100% in an aqueous solution and produce Hydronium Ion.
Now, the Formula to calculate pH of 0.0023 M HCl is, pH = – log (Molarity)
pH = – log (0.0023)
pH = – (-2.64)
pH = 2.64
For 0.0018 M KOH, KOH is a base so it will produce Hydroxide Ion in an aqueous solution.
So for this, first calculate pOH and convert it into pH.
pOH = – log (Molarity)
pOH = – log (0.0018)
pOH = 2.74
Now, on using equation A,
pH + 2.74 = 14
pH = 11.26
This implies that the lower the pH the more acidic the solution is.
Therefore, the Rank from most acidic to most basic is 0.0023 M HCl pH = 5.45 and pOH = 8.550.0018 M KOH.
The final words
So overall to calculate the acidity and basicity, you should first calculate the pH of the solution. We hope you got your answer and understood the concept behind ranking or arranging the aqueous solution from most acidic to basic.
Conclusion
We Hope this blog is sufficient enough to provide the information about Arrange the following aqueous solutions, all at 25° C, in order of decreasing acidity. Thanks for reading this blog.
