6. In Group C, do all four compounds appear to be molecular, ionic, or molecular acids? Based on this answer, would you expect them to dissociate? 7. How do you explain the relatively high conductivity of tap water compared to a low or zero conductivity for distilled water? 8. Did aqueous methanol, CH OH, have the same conductivity value as aqueous ethylene glycol, CH.O.? Explain.

The H⁺ concentration in an aqueous solution at 25 °C is 5.9 × 10⁻⁴. What is [OH⁻]?

A. What is the pH of an aqueous solution with a hydrogen ion concentration of [H+]=7.2×10−5[H+]=7.2×10−5 M?   B. What is the hydroxide ion concentration, [OH−][OH−], in an aqueous solution with a hydrogen ion concentration of [H+]=7.2×10−5[H+]=7.2×10−5 M? C. A monoprotic weak acid, HAHA, dissociates in water according to the reaction HA(aq)↽−−⇀H+(aq)+A−(aq)HA(aq)↽−−⇀H+(aq)+A−(aq) The equilibrium concentrations of the reactants and products are [HA]=0.120 M[HA]=0.120 M, [H+]=3.00×10−4 M[H+]=3.00×10−4 M, and [A−]=3.00 ×10−4 M[A−]=3.00 ×10−4 M. Calculate the ?aKa value for the acid HA.

E' E a. a. C6H5NH2 (aq) + H₂O (l) C6H5NH3* (aq) + OH- (aq) When you measure the concentrations of the ionized substances you find them to be: [C6H5NH₂] = 0.234 mol/L [C6H5NH3*] = 2.8 x 10-5 mol/L [OH-]= 2.8 x 10¹5 mol/L If the Kb is 4.27 x 10-10, is the reaction at equilibrium? If not, which direction does it need to move (right or left) to reach equilibrium? Explain. At equilibrium the concentrations of the ionized substances are: [C6H5NH₂] = 0.0537 mol/L [C6H5NH3*] = 4.79 x 10¹ mol/L [OH-]= 4.79 x 10-6 mol/L If this reaction is taking place in a 2.0L container, and 1.5 moles of phenylamine were added to the reaction, what will the new concentrations of the three ionic species be when equilibrium is re-established? CoHsNHz(aq) + H₂O (l) 2. Determine the K₂ for the above solutior 3. Determine the pH for the above solution 누 C6H5NH3+ (aq) + OH- (aq)

K Consider a situation in which acid rain has heavily polluted a lake to a level of pH 4. An unscrupulous chemical company dumps some acid into the lake illegally. Assume that the lake contains 250 million gallons of water and that the company dumps 250,000 gallons of acid with pH 2. Complete parts (a) through (d) below. a. What is the hydrogen ion conentration, [H*], of the lake polluted by acid rain alone? 4 10 (Type your answer using exponential notation.) b. Suppose that the unpolluted lake, without acid rain, would have a pH of 7. If the lake were then polluted by company acid alone (no acid rain), what hydrogen ion concentration [H], would it have? Round to the nearest power of ten, as necessary. (Type your answer using exponential notation.) X + View an example Get more help - Vi Clear all More Check answer X

The concentration of hydroxide ion in an aqueous solution at 25°C is 7.2 x 10-4 M. What is the concentration of the hydronium ion? 1 2 3 4 6. C 7 8 9. +/- x 100 +