[ "article:topic-guide", "showtoc:no", "license:ccbyncsa" ], by Brown, LeMay, Busten, Murphy, and Woodward. 166 27 b) two points The equilibrium pressure of NH3 gas would decrease. Start studying Graphs Review Pre and AP Chemistry. Practice: Equilibrium questions. calculate average reaction rates with respect to either reactants or products. Directions: Questions 1–3 are long free-response questions that require about 23 minutes each to answer and are worth 10 points each. Vapor pressure is an example of a physical equilibrium because only the physical form of the substance changes. 2. Justify your answer. Similarly, in Chapter 13, we discussed saturated solutions, another example of a physical equilibrium, in which the rate of dissolution of a solute is the same as the rate at which it crystallizes from solution. In this chapter, we describe the methods chemists use to quantitatively describe the composition of chemical systems at equilibrium, and we discuss how factors such as temperature and pressure influence the equilibrium composition. AP Chemistry 2020-2021. b) Explain what may have happened at T1 c) Complete the following graphs to show what the rate vs time graph would look like if each of the following changes occurred. Hart. Hart . We’ll just pretend that the [N 2O 4] = 3.0M and the [NO 2] = 1.0M . In order for the pressure equilibrium 0000022862 00000 n 0000001558 00000 n Reactions in equilibrium. 0000002472 00000 n It is handy to know how changes to a chemical system, at equilibrium, influences the concentration-time and rate graphs of that system. trailer Worksheets for Advanced Placement (AP) Chemistry based upon the 6 UNIT organization for the AP Chemistry Exams 2014-2019. AP Chemistry: Intermolecular Forces, Liquids, and Solids Lecture Outline 11.1 A Molecular Comparison of Liquids and Solids Physical properties of liquids and solids are due to intermolecular forces. AP* General Equilibrium Free Response Questions page 2 1992. Mar 25, 2013 - This Pin was discovered by ChemKate. N2(g) + 3 H2(g) x 2 NH3(g) For the reaction represented above, the value of the equilibrium constant, Kp is 3.1 × 10-4 at 700 K. a) Write the expression for the equilibrium constant, Kp, for the reaction. 0000035569 00000 n How can I Practice AP® Chemistry Multiple Choice? Create-A-Graph This is an easy-to-use website for creating graphs. mixture reaches equilibrium at. As you study these concepts, you will also learn how urban smog forms and how reaction conditions can be altered to produce H2 rather than the combustion products CO2 and H2O from the methane in natural gas. Remember, it is a dynamic equilibrium. 1 2 0000005144 00000 n The best course of action involves developing your own AP® Chemistry study plan so you can work ahead, paying attention in class, and utilizing excellent resources. Discover (and save!) This is the official College Board site with information about the Chemistry AP exam and other offerings by College Board. If the frequency (v), or # of waves per second that pass a point in space, is low, the metal absorbs … The primary audience for this activity would be students in an IB or AP chemistry course as it assumes students already know how to create tables and graphs. Chemistry toolkit ix Module 5: Equilibrium and acid reactions KEY KNOWLEDGE 3 WORKSHEETS WORKSHEET 5.1 Knowledge review—thinking about rates and energy 12 WORKSHEET 5.2 Exploring equilibrium—reactions in the balance 13 WORKSHEET 5.3 Calculations—equilibrium constants and concentrations 16 WORKSHEET 5.4 Equilibrium—Le Châtelier’s 1. As such, they are omitted. Notes on Graphs Involving LCP Page 1 Chemistry 12 Notes on Graphs Involving LeChatelier’s Principle 1. 15.7: Le Chatelier's Principle 0000001878 00000 n AP Chemistry/1516. You should be able to… Chapter 14 (Kinetics) • identify and explain the factors that affect reaction rates • calculate average reaction rates with respect to either reactants or products • calculate instantaneous reaction rates from graph or table data Units include atomic structure, periodicity, bonding, reactions, gas laws, stoichiometry, thermodynamics, kinetics, equilibrium, solution chemistry, and electrochemistry. Physical properties of substances are understood in terms of kinetic-molecular theory. Light exists as both a particle and a wave. The Photoelectric Effect. Feb 18, 2018 - Explore Debi Smith's board "Chemical equilibrium" on Pinterest. We introduced the concept of equilibrium in Chapter 11, where you learned that a liquid and a vapor are in equilibrium when the number of molecules evaporating from the surface of the liquid per unit time is the same as the number of molecules condensing from the vapor phase. Kinetics, Equilibrium, Acids and Bases. Explain. 0000022618 00000 n 0000023366 00000 n Look at the following example: Given the equilibrium: N 2O 4 Dec 31, 2016 - Explore Wendy Czerwinski's board "Equilibrium" on Pinterest. 3 1.0 atm? 0000008172 00000 n These are forces between molecules. (a) A sample of 100. grams of solid NaHCO 3 was placed in a previously evacuated rigid 5.00-liter container and heated to 160°C. AP Chemistry/1516 . Now that you are armed with information about the AP® Biology multiple-choice questions, it’s time to study and get that 5. Section II . Graphs derived by plotting a few equilibrium concentrations for a system at a given temperature and pressure can be used to predict the direction in which a reaction will proceed. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. The curriculum for all AP classes is prescribed by the College Board. AP Chemistry. How does a catalyst affect activation energy? AP Chem CH 7: Periodic Properties; AP Chem CH 6 Electronic Structure; AP Chem CH 5: Thermochemistry; AP Chem CH 4: Aqueous Rx & Solution Stoichiometry; AP Chem Reaction Prediction Sets; AP Chem Resources; AP Chem Summer Assignment 2020; Honors Chemistry. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. 0000026918 00000 n What is the main idea behind collision theory and effective collisions? 0000002923 00000 n GO ON TO THE NEXT PAGE. AP Chemistry . chemical equilibrium: In a chemical reaction, ... “Activity” is a term in physical chemistry used to describe a substance ‘s ideal concentration. 2 NaHCO3(s) p Na2CO3(s) + H2O(g) + CO2(g). Honors Chem: CH 2: Atoms, Molecules and Ions General Equilibrium Essay Questions 1988 Average score = 4.31 a) two points The equilibrium pressure of NH3 gas would be unaffected Kp = (PNH3) (PH2S). x�b```�5�Ls@ (���������łÚ��U��?��j>s.�����Ѐ�Ǧ��ü_=M%R7�J(�*\x���W�+�ӎ�$tkk7���(29�-ZB�N�&[�Y���Q4,&�]����r]9�$�O��zk��}�[l�1. 0000001304 00000 n 0000008072 00000 n Standard change in free energy and the equilibrium constant. 1) At equilibrium the rates of the forward and backward reactions are equal. What is kinetics? 3. If the rate of the forward reaction is greater than the reverse reaction, then there is a … This is a video that goes through a review of chapter 13: Equilibrium. P NO 2 at equilibrium be equal to . Creating graphs, diagrams, and models that represent chemical phenomena ... You’ll chart how chemical reactions change over time, what causes substances to reach equilibrium, and how systems react when that equilibrium is disturbed. 0 At the half-equivalence point (where the volume of the base added is exactly half its volume at the equivalence point), the concentration [HX] of the weak acid equals the …