Answer: A> B> C > D> E
Step-by-step explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
a) Solution A: pH =2
b) Solution B: pH =5
![[H^+]=10^(-5)](https://img.qammunity.org/2022/formulas/chemistry/college/z71v9p6vkxof6seltrqoi51iick1omf0hz.png)
c) Solution C: pH = 7
![[H^+]=10^(-7)](https://img.qammunity.org/2022/formulas/chemistry/college/2wdh92op3h8ettertib7vz25yzf4qxy3o4.png)
d) Solution D: pH = 8
![[H^+]=10^(-8)](https://img.qammunity.org/2022/formulas/chemistry/college/blipwne8et2ocjgpqfkdnmc8c9eb3v8ot6.png)
e) Solution E: pH =13
![[H^+]=10^(-13)](https://img.qammunity.org/2022/formulas/chemistry/college/bwf7li9zmetahtgi0yuoxsl0nn1uh3xv8q.png)
Thus the decreasing order of hydrogen ion concentration is A> B> C > D> E