Study the reaction. 2HCl (g)+I2 (s)⇌2HI (g)+Cl2 (g) When the reaction is at equilibrium, some amount of HI is added. The system then reaches equilibrium again. How does the concentration of Cl2 change compared to the first equilibrium? The concentration is zero. The concentration is higher. The concentration is lower. The concentration is the same. Study the reaction. CaO (s)+H2O (l)⇌Ca(OH)2 (s)+heat How does the equilibrium position react if the temperature is decreased? The equilibrium position shifts to the right. The equilibrium position becomes less stable. The equilibrium position shifts to the left. The equilibrium position remains the same. What happens to the rates of solvation and crystallization at the saturation point? The rates switch from zero to equal. The rates are zero. The rates are equal. The rates are unequal. Iron fluoride (FeF2) dissociates according to the following equation: FeF2(s) ⇌ Fe2+(aq) + 2F–(aq) If the [Fe2+] in a saturated solution is measured to be 2.05 × 10–4 mol/L, what is the concentration of fluoride (F–) ions in a saturated solution? 1.03 × 10–8 mol/L 4.10 × 10–4 mol/L 2.05 × 10–4 mol/L 4.20 × 10–8 mol/L Mary prepares four solutions with different H3O+ concentrations. Solution [H3O+] 1 1 x 10-5 M 2 1 x 10-3 M 3 1 x 10-9 M 4 1 x 10-13 M my son needs help with these homework question