Answer
a. $[H^+]=6.7*10^{-15}\text{ M}$, Basic
b. $[H^+]=2.8\text{ M}$, Acidic
c. $[H^+]=1.0*10^{-7}\text{ M}$, Neutral
d. $[H^+]=1.4*10^{-11}\text{ M}$, Basic
Work Step by Step
a.
$[H^+][OH^-]=1.0*10^{-14}$
$[H^+]*1.5=1.0*10^{-14}$
$[H^+]=6.7*10^{-15}\text{ M}$
Because $[H^+][OH^-]$, the solution is acidic.
c.
$[H^+][OH^-]=1.0*10^{-14}$
$[H^+]*1.0*10^{-7}=1.0*10^{-14}$
$[H^+]=1.0*10^{-7}\text{ M}$
Because $[H^+]=[OH^-]$, the solution is neutral.
d.
$[H^+][OH^-]=1.0*10^{-14}$
$[H^+]*7.3*10^{-4}=1.0*10^{-14}$
$[H^+]=1.4*10^{-11}\text{ M}$
Because $[H^+]
