Chemistry- Unit 4 3.5 / 5 ChemistryKinetics and EquilibriaA2/A-levelAQA Created by: lucyk139Created on: 12-03-14 11:12 For the equation A+B-->C+D, and the order with respect to A is 1 and with respect to B is 2, what is the rate equation? Rate = k[A][B]^2 1 of 17 For the equation A+B-->C+D, when the [A] doubles, there is no effect on the rate. What is the order with respect to A? 0th order 2 of 17 For the equation A+B-->C+D, when the [A] doubles, the rate also doubles. What is the order with respect to A? 1st order 3 of 17 Step one of a reaction is slow. Step two is fast. Which is the rate determining step? Step one 4 of 17 For the general equation aA + bB --> dD + eE, what is the expression for the equilibrium constant, Kc? Kc= ([D]^d * [C]^c) / ([A]^a * [B]^b) 5 of 17 State Le Chatelier's Principle If there's a change in concentration, pressure or temperature, the equilibrium will move to help counteract the change. 6 of 17 What is the definition of a Bronsted-Lowry acid? A proton donor 7 of 17 What is the definition of a Bronsted-Lowry base? A proton acceptor 8 of 17 What is the equation for the dissociation of a strong acid in water? HA + H2O --> H3O(+) + A(-) OR HA --> H(+) + A(-) 9 of 17 Write the expression for Kw Kw = [H(+)] [OH(-)] 10 of 17 Write an expression for pH in terms of [H(+)] pH = -log[H+] 11 of 17 Write an expression for [H+] in terms of pH [H+] = 10^-pH 12 of 17 If you have 0.1moldm^-3 hydrochloric acid, what is the pH of the solution? 1.0 13 of 17 If you have 0.25moldm^-3 sulfuric acid, what is the pH of the solution? 0.30 14 of 17 The Kw value at 298K is 1.0x10^-14. Find the pH of 0.1moldm^-3 NaOH at 298K. 13.0 15 of 17 Find the pH of a 0.02moldm^-3 solution of propanoic acid. Ka is 1.30X10^-5. 3.29 16 of 17 The pH of an ethanoic acid solution is 3.02. Calculate the molar concentration of this solution. The Ka of ethanoic acid is 1.75x10^-5. 0.0521moldm^-3 17 of 17

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