What is the pH of #10^(-2)# #"M HCl"# solution?

2 Answers
Queen · Stefan V.
Apr 6, 2018

#2#

Explanation:

Because

#["H"^(+)]= 10^-"pH"#

Therefore, the exponent of #10# is the pH and this makes sense because the #"pH"# #(2)# is less than #7#, which indicates that it should be an acid. This is true because #"HCl"# is a strong acid, i.e.

#["H"^(+)] = ["HCl"]#

Nam D.
Apr 6, 2018

#2#

Explanation:

Hydrochloric acid is a strong acid which dissociates into single hydrogen #(H^+)# ions in an aqueous solution.

The #"pH"# of a solution is given by the equation,

#"pH"=-log[H^+]#

  • #[H^+]# is the hydrogen ion concentration in terms of molarity

And so, we got:

#"pH"=-log[10^-2]#

#=2#

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