Answers 1. (a) Heat required to increase the temperature of 1.00 g of Li metal = g/mol 6.94g 1 24.8 J/molC 1C = 3.57 J Heat required to increase the temperature of 1.00 g of Rb metal = g/mol 85.47g 1 31.0 J/molC 1C = 0.363 J (b) To achieve a temperature c
1 L of 0.02 M CaCl2 and 1 L of 0.0004 M Na2SO4 are mixed together. Will there be a precipitate of CaSO4 formed in this reaction? (no precipitate is formed.)
2. 500 mL of 4 x 10-5 M AgNO3 is mixed with 500 mL 8 x 10-4 M NaCl. Will precipitate form? Solutio
Qsp < Ksp - This means there are not enough ions in the solution. In order to return to equilibrium, more of the solid salt must dissociate into its ions. Qsp = Ksp - This means that the system is at equilibrium.
Qsp > Ksp - This means that there
Kinetics Lesson 6 Increasing Rates
Factors that Affect the Reaction Rate A homogeneous reaction is one where all the reactants are in the same phase. They are fast due to thorough mixing and many collisions!
1.State the equilibrium expressions for the following reactions. (a) CO(g) + H2O(g) CO2(g) + H2(g) (b) 3I2(g) + 6F2(g) 2IF5(g) + I4F2(g) 2. The equilibrium constant for the synthesis of HBr(g) from hydrogen and bromine gas
is 2.18 106 at 730C. H2(g) + Br2
Consider the following concentration-time graph:
a) What imposed change occured at 20s? At 30s? At 45s? b) Explai nthe changes between 20 and 25 s us Le Chatelier's principle.
c) What chnage, if any, would have been noted if a catalyst had been present fo
The Factors Affecting Equilibrium The composition of the equilibrium state (i.e. the proportion of reactants and products) is determined by: 1) The Tendency Towards Minimum Potential Energy (Enthalpy or H) H = Hproducts - Hreactants H < 0: The forw
Glen D'Souza Sannan Jamil Vinnopaul Gupta Aka VINNO VIJAYAKUMAR Austin
Oxidation And Reduction
l l l l
l l l l l
Reduction is the addition or gain of electrons Oxidation is the loss of electrons The total number of electrons gained must equal the total nu
Define chemical equilibrium. A chemical equilibrium is "dynamic". What does this indicate? How are equilibrium reactions written differently than other chemical reactions? Explain how an equilibrium forms from pure reactants.
Concentrations of reactants a
Kinetics Lesson 6 Collision Theory
The Collision Theory Link to Simulation of Molecular Motion 1. 2. Matter is moving particles. Temperature increases- particles move faster -more collisions -more collision energy. Chemical reactions -bonds break -new bon
Chapter 7: Chemical Systems In
Chapter 7.1: Dynamic Equilibrium in Chemical Systems
What is a Closed a System?
A system that may exchange energy but not matter with its surroundings.
What does it mean when we say a closed system is in dynamic equilibrium
Chemistry is a fascinating science, full of unusual trivia! Here are some fun and interesting chemistry facts for you. The only elements that are liquid at room temperature are bromine and mercury. However, you can melt gallium by holding a lump in the wa
Each metal has a different capacity to oxidize. The electrochemical interaction depends on the other metal's tendency to oxidize. If one metal has a higher capacity to oxidize then it will do so while the other metal will undergo reduction. To the left, n
1. What is the sign of the entropy change in each chemical reaction? a) ice melting (b) water vapour condensing (c) sugar dissolving in water (d) HCl(g) + NH3(g) NH4Cl(s) (e) CaCO3(s) CaO(s) + CO2(g) 2. What is the sign of the entropy change in each chemi
1. For each of the follwoing equilibria, predict whether the system will shift in the forward or reverse directions. Note the energy changes involved and assume that the volume remains constant. a. heat is removed from: A B
heat is removed from: A + B
Many + Parts This name hints at
how polymers are made
Latin: Plasticus, that which can be molded
This name honors plastics useful property of being easily molded
The word, polymer, implies that polymers are constructed from pieces (monomers) that can be e
Polymers are: Long-chain molecules. Found in nature, including cellulose in plants, starches in food, proteins and DNA in the body. Also synthetic such as polyethylene and polystyrene, Teflon, and nylon.
Weak acids Question: A 0.128 M solution of uric acid (HC5H3N4O3) has a pH of 2.39. Calculate the Ka of uric acid. Another reason for using the generic acid formula of HA is that this avoids the need to constantly write a somewhat complex formula for the a
At a higher temperature, Kw = 1.5 x 10-14. Find the pH of a solution if [H+] = [OH-].
Solution pKw = -log Kw = -log (1.5 x 10-14) = 13.8 Since [H+] = [OH-], and 13.8 = pH + pOH therefore 13.8 = (x) + (x) 6.9 = pH
Given your answer in Question 7, does this
Ca(OH)2 has a low solubility in water. How can it be a strong base? What does the strength of an acid or base indicate about its conjugate? What is a buffer? Give an example of a buffer. Write the general equation important in buffer systems. Explain how
Section 12.1 Classification of the Elements
Explain why you can infer the properties of an element based on those of other elements in the periodic table.
Section 12.1 Classification of the Elements
Use electron configurations to
Organic Compound Naming Worksheet
Write the name of each of the following organic compounds: 1) 2)
CH3 H3C C CH3 CH2 C F CH CH CH CH3
Write the structures for the following organic molecules: 1) methylcyclopentane
HI ALL, The program does not allow me to upload the animations to My Class site. Try this web site. The last chapter is on Nuclear Reactions. Enjoy your weekend. http:/www.wwnorton.com/college/chemistry/gilbert2/chemtours.asp Reminders: 1. Hess's law lab
Equilibrium Constant Calculations Part 2
1. Calculating K At a constant temperature, 0.100 moles of H2 are mixed with 0.100 moles I2 in a 1.00 L flask. Determine the equilibrium constant (K) if the equilibrium concentration of I2 is 0.020 M. Given:
Equilibrium Constant Calculations Part 2 1. Calculating K At a constant temperature, 0.100 moles of H2 are mixed with 0.100 moles I2 in a 1.00 L flask. Determine the equilibrium constant (K) if the equilibrium concentration of I2 is 0.020 M. Given: [Initi
Early History of Atomic Theories
a) Dalton Atomic theory
Key Experimental work Law of definite composition: elements combine in a characteristic mass ratio Theoretical explanation Each atom has a particular combining capacity Atomic Theory Matter is compo
Catalytic Converter The combustion of nitrogen gas yields nitrogen monoxide. The incomplete combustion of hydrocarbons can also yield carbon monoxide. These two reactions occur in the engine of a car. Nitrogen monoxide will oxidize in the atmosphere to pr
Calculate the percentage of citric acid in a candy if 1.35 g of the candy was exactly neutralized by 29.50 mL of 0.148 M sodium hydroxide solution. The formula for citric acid is H3C6H5O7.
Methylamine, CH3NH2, is a weak base that reacts according to the e