Final answer:
To determine the molarity of cobalt (II) and nickel (II) ions, the moles are calculated based on molarity and volume of their respective solutions, and then the molarity is found by dividing moles by the final combined volume. For chlorine ions, moles are summed from both solutions and divided by the combined volume for final molarity.
Step-by-step explanation:
Calculating Molarity of Ions After Mixing Solutions
To calculate the molarity of each ion in the final solution after mixing 50.00 mL of 0.250 M CoCl2 with 25.0 mL of 0.350 M NiCl2, we first need to determine the moles of each ion in the individual solutions before mixing.
First, for CoCl2:
Moles of CoCl2 = Molarity × Volume (in liters)
Moles of Co2+ = Moles of CoCl2
Moles of Cl− = 2 × Moles of CoCl2
For the NiCl2 solution:
Moles of NiCl2 = Molarity × Volume (in liters)
Moles of Ni2+ = Moles of NiCl2
Moles of Cl− (from NiCl2) = 2 × Moles of NiCl2
After calculating the individual moles, we add the moles of Cl− from both solutions to get the total moles of Cl− in the final mixture. Finally, molarity of each ion is calculated by dividing the total moles of that ion by the total volume of the mixture in liters.
The molarity of Co2+ and Ni2+ is simpler as these come from only one source each, and the final volume is the sum of the volumes of the two solutions mixed.