What are $[HO^-]$ , and $[H_3O^+]$ in the following solutions....?

Question

$a.$ $0.159molL^-1$ $HNO_3(aq)$ .

$b.$ $0.0150molL^-1$ $H_2SO__4(aq)$ .

$c.$ $1.33molL^-1$ $KOH(aq)$ .

$d.$ $4.72xx10^-4molL^-1$ $Ca(OH)_2(aq)$ .

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Answer 1 · 2017-03-21T19:04:55

All of these are strong acids, OR strong bases..........

And thus $H_3O^+$ or $""^(-)OH$ are present in stoichiometric amounts.

$a.$ $0.159*mol*L^-1$ $HNO_3(aq)$ is $0.159*mol*L^-1$ in $H_3O^+$ .

$b.$ $0.0150*mol*L^-1$ $H_2SO__4(aq)$ is $0.0300*mol*L^-1$ in $H_3O^+$ , i.e. $"sulfuric acid"$ is diprotic.

$c.$ $1.33*mol*L^-1$ $KOH(aq)$ is $1.33*mol*L^-1$ in $HO^-$ .

$d.$ $4.72xx10^-4*mol*L^-1$ $Ca(OH)_2(aq)$ is $9.44xx10^-4*mol*L^-1$ in $HO^-$ .

All of these species are strong acids OR strong bases, and thus they are stoichiometric in $H_3O^+$ or $HO^-$ .