Question

Please explain how you arrived at the answer, the current inputs are incorrect.

Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH. Reference the K_a and K_b Tables, and think about the ac d/base properties of each species present. C_5H_5N H_3BO_3 HONH_3I Ca(OH)_2 KNO_3 Ca(OBr)_2 HClO_4

Answer 1

correct order :

7) Ca(OH)2 is the strong base among all so it has highest pH

1) HClO4 is the strong acid among all so it has lowest pH

2) H3BO3 is weak acid so pH is less than 7 . it is next lowest pH

3) OHNH3I is the salt of weak base and strong acid . so the pH < 7

4) KNO3 is the salt of strong acid and strong base so pH is exactly 7. so it should be next place

now C5H5N , Ca(OBr2) remains

5) C5H5N is the weak base its pKb value

6 ) Ca(OBr2)