Write the conjugate acid and conjugate base of the following:     

${\mathrm{CH}}_3{\mathrm{O}}^{-}$                                                               

Which is the stronger base in each of the following pairs?

${\mathrm{NH}}_{3 }$ and ${\mathrm{PH}}_3$

Which is the stronger base in each of the following pairs?

${{\mathrm{NH}}_2}^{-}$ and ${\mathrm{OH}}^{-}$

Which is the stronger base in each of the following pairs?

${\mathrm{HS}}^{-}$ and ${\mathrm{F}}^{-}$

Choose the member of each of the following pairs of compounds that is likely to be the stronger base.

${\mathrm{NH}}_3 \mathrm{or} {\mathrm{NH}}_2^{⊝}$

Choose the member of each of the following pairs of compounds that is likely to be the stronger base.

${\mathrm{H}}_2\mathrm{O} \mathrm{or} {\mathrm{OH}}^{-}$

Choose the member of each of the following pairs of compounds that is likely to be the stronger base.

${\mathrm{NH}}_3 \mathrm{or} {\mathrm{NH}}_4^{+}$

Choose the member of each of the following pairs of compounds that is likely to be the stronger base.

${\mathrm{OH}}^{-}$ or ${\mathrm{SH}}^{-}$ 

Choose the member of each of the following pairs of compounds that is likely to be the stronger base.