Question

ph value of strong acid solution is 5.0,what will be the ph of the solution obtained by diluting the given solution 100 times? ​

Answer 1

Explanation:

Answer: neutral

pH=5 means the solution is acidic. On dilution, it will remain acidic. However acidic character decreases so much that it is almost neutral (pH=5 means [H+]=10−5M)

After dilution, [H+]=10−5100=10−7M

[H+] from H2O cannot be neglected.

Hence total [H+]=10−7+10−7=2×10−7 M

pH=−log(2×10−7)=7=0.3010=6.699≈7

Infact, in none of the given answers is correct acidic character decreases.