After adding 112 mL of 0.050 M EDTA to 50 mL of 0.100 M metal ions, what is the concentration of metal ions?

• A. 2.69 x 10^-6 M
• B. 5.00 x 10^-6 M
• C. 1.00 x 10^-6 M
• D. 3.00 x 10^-6 M

Answer: (A)