Chemistry - Ionic Equilibrium Question with Solution | TestHub

In (a)

HCl + NaOH $⟶$ NaCl + H₂O m. mol

10 10 0 0

0 0 10 10 pH = 7

In (b)

HCl + NaOH $⟶$ NaCl + H₂O m. mole

5.5 4.5 0 0

1.0 0 4.5 4.5

$[H^{+}]$ = $\frac{1}{100}=10^{-2}$ pH = 2

In (c)

HCl + NaOH $⟶$ NaCl + H₂O m. mole

1 9 0 0

0 8 1 1

$[O{H}^{-}]$ = $\frac{8}{100}$

pOH = 1.096; pH = 12.9

In (d)

HCl + NaOH $⟶$ NaCl + H₂O m. mole

15 5 0 0

10 0 5 5

$[H^{+}]$ = $\frac{10}{100}=10^{-1}$ pH = 1