Which of the following options correctly reflect the steps required to calculate the molar solubility of PbCl₂ in 0.15 M NaCl if Ksp for PbCl₂ = 1.7 í— 10-5?
1) Calculate the concentration of Pb2+ ions in the solution
2) Calculate the concentration of Cl⁻ ions in the solution
3) Use the Ksp expression to calculate the molar solubility of PbCl₂
4) Use the concentration of NaCl to calculate the molar solubility of PbCl₂