Question

What NaCl concentration results when 259ml of a 0.810 M NaCl solution is mixed with 562 ml of a 0.280 M NaCl solution?

Answer 1

We will use the formula

$MV=M_1V_1+M_2V_2$

$M(259+562)=0.810\times259+0.280\times562 \newline M(821)=209.8+157.4=367.20$

$M=0.45$