Question 1
If 100. mL of 0.400 mol L
-1 Na
2SO
4(aq) is added to 200 mL of 0.600 mol L
-1 NaCl(aq), what is the concentration of Na
+ ions in the final solution? Assume that the volumes are additive.
◦ 0.534 mol L
-1◦ 0.667 mol L
-1◦ 1.00 mol L
-1◦ 1.40 mol L
-1Question 2
If 5.97 mL of a solution of NaCl contains 2.54 mg of sodium ion, what is the molarity of the sodium chloride solution?
◦ 0.425 M
◦ 1.85 × 10
-2 M
◦ 1.85 × 10
-5 M
◦ 7.28 × 10
-3 M
◦ 0.102 M