.![\left[\mathrm{H_3O^{+}}\right]](/tpl/images/0629/7930/17c4d.png)
of an aqueous solution can be found from its 
with the equation:![\displaystyle \left[\mathrm{H_3O^{+}}\right] = 10^{-\mathrm{pH}}](/tpl/images/0629/7930/3c39f.png)
.
. Hence,![\begin{aligned}& \left[\mathrm{H_3O^{+}}\right] \\ &= 10^{-\mathrm{pH}} \\ &= 10^{-11.7} \approx 2 \times 10^{-12}\end{aligned}](/tpl/images/0629/7930/10c0e.png)
. 
Calculate the hydronium ion concentration in an aqueous solution with a pH of 11.7 at
25°C....
Answers: 1
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