ANS: c$)1\mathrm{.}4{10}^{-3}M$

$10.$ Which of the following will not produce a buffered solution?

a$)100mL$ of $0\mathrm{.}1MN{a}_{2}C{O}_3$ and $50mL$ of $0\mathrm{.}1MHCl$

b$)100mL$ of $0\mathrm{.}1MNaHC{O}_3$ and $25mL$ of $0\mathrm{.}2MHCl$

c$)100mL$ of $0\mathrm{.}1MN{a}_{2}C{O}_3$ and $75mL$ of $0\mathrm{.}2MHCl$

d$)50mL$ of $0\mathrm{.}2MN{a}_{2}C{O}_3$ and $5mL$ of $1\mathrm{.}0MHCl$

e$)100mL$ of $0\mathrm{.}1MN{a}_{2}C{O}_3$ and $50mL$ of $0\mathrm{.}1$MNaOH

ANS: e$)100mL$ of $0\mathrm{.}1MN{a}_{2}C{O}_3$ and $50mL$ of $0\mathrm{.}1$MNaOH