Đáp án:
\(\begin{array}{l}
\% {m_{NaCl}} = 17,55\% \\
\% {m_{NaI}} = 45\% \\
\% {m_{NaF}} = 37,45\%
\end{array}\)
Giải thích các bước giải:
\(\begin{array}{l}
a)\\
C{l_2} + 2NaI \to 2NaCl + {I_2}\\
NaCl + AgN{O_3} \to AgCl + NaN{O_3}\\
NaI + AgN{O_3} \to AgI + NaN{O_3}\\
b)\\
hh:NaF(a\,mol),NaCl(b\,mol),NaI(c\,mol)\\
{n_{AgCl}} = \dfrac{{8,61}}{{143,5}} = 0,06\,mol\\
\left\{ \begin{array}{l}
42a + 58,5b + 150c = 10\\
42a + 58,5b + 58,5c = 7,255\\
b + c = 0,06
\end{array} \right.\\
\Rightarrow a = \dfrac{{107}}{{2000}};b = 0,03;c = 0,03\\
\% {m_{NaCl}} = \dfrac{{0,03 \times 58,5}}{{10}} \times 100\% = 17,55\% \\
\% {m_{NaI}} = \dfrac{{0,03 \times 150}}{{10}} \times 100\% = 45\% \\
\% {m_{NaF}} = 100 - 17,55 - 45 = 37,45\%
\end{array}\)