5. Why are some salts acidic when others are neutral? (2 marks) Curriculum Expectation E2. investigate the qualitative and quantitative nature of chemical systems at equilibrium, and solve related problems. 1. Consider the following reaction: PCI (9)+ Cl2 (9) = PCI, (9) K = 4.30 x 106 Initially, 2.50 M PCI, and 1.40 M CI, are placed into a container and allowed to reach equilibrium. Determine the equilibrium concentrations of all the species