Student Expectation
... Key Concept 1: During a chemical reaction, the atoms of substances rearrange themselves into a new configuration forming new substances. The reactants (or the energy and atoms or molecules of the original substance) combine to produce products (or the energy, atoms, and molecules of the new substanc ...
... Key Concept 1: During a chemical reaction, the atoms of substances rearrange themselves into a new configuration forming new substances. The reactants (or the energy and atoms or molecules of the original substance) combine to produce products (or the energy, atoms, and molecules of the new substanc ...
Types of reactions: redox reactions
... As a reactant, chlorine has an oxidation number of zero, but as part of the product magnesium chloride, the element has an oxidation number of -1. Each chlorine atom has gained an electron and the element has therefore been reduced. The half-reaction for this change is: ...
... As a reactant, chlorine has an oxidation number of zero, but as part of the product magnesium chloride, the element has an oxidation number of -1. Each chlorine atom has gained an electron and the element has therefore been reduced. The half-reaction for this change is: ...
Oxidation-Reduction Reactions Oxidation-Reduction
... An important method for determining the amount of a particular substance is based on measuring the volume of the reactant solution. Titration is a procedure for determining the amount of substance A by adding a carefully measured volume of a solution with known concentration of B until the reaction ...
... An important method for determining the amount of a particular substance is based on measuring the volume of the reactant solution. Titration is a procedure for determining the amount of substance A by adding a carefully measured volume of a solution with known concentration of B until the reaction ...
Chapter 3
... • Actual yield = amount of product you actually get – Usually the case that actual yield is less than theoretical ...
... • Actual yield = amount of product you actually get – Usually the case that actual yield is less than theoretical ...
Strumenti tutor LIM
... In a physical transformation...................... (no change takes place in the identity of the substance) A chemical transformation takes place when....................(atoms in the reactants are rearranged to form new substabces)(old bonds are broken and new bonds are formed)( at least one new su ...
... In a physical transformation...................... (no change takes place in the identity of the substance) A chemical transformation takes place when....................(atoms in the reactants are rearranged to form new substabces)(old bonds are broken and new bonds are formed)( at least one new su ...
File
... One potential problem with the operation of a catalytic converter is that it may lose its effectiveness when impurities bind strongly to the catalyst surface and accumulate and inactivate it. When this occurs, the ineffective catalytic converter is said to be poisoned, and must be replaced. One last ...
... One potential problem with the operation of a catalytic converter is that it may lose its effectiveness when impurities bind strongly to the catalyst surface and accumulate and inactivate it. When this occurs, the ineffective catalytic converter is said to be poisoned, and must be replaced. One last ...
AP Semestar Exam REVIEW
... ____ 55. All of the following statements are true EXCEPT a. the enthalpy change of an endothermic reaction is positive. b. at constant pressure the heat flow for a reaction equals the change in enthalpy. c. H for a reaction is equal in magnitude but opposite in sign to H for the reverse reaction. ...
... ____ 55. All of the following statements are true EXCEPT a. the enthalpy change of an endothermic reaction is positive. b. at constant pressure the heat flow for a reaction equals the change in enthalpy. c. H for a reaction is equal in magnitude but opposite in sign to H for the reverse reaction. ...
Chapter 8
... decomposition, single-displacement, and doubledisplacement reactions. • Classify a reaction as a synthesis, decomposition, single-displacement, double-displacement, or combustion reaction. • List three kinds of synthesis reactions and six kinds of decomposition reactions. ...
... decomposition, single-displacement, and doubledisplacement reactions. • Classify a reaction as a synthesis, decomposition, single-displacement, double-displacement, or combustion reaction. • List three kinds of synthesis reactions and six kinds of decomposition reactions. ...
Chemistry
... questions, candidates are required to use principles and concepts that are within the syllabus and apply them in a logical, reasoned or deductive manner to a novel situation. Questions testing these objectives will often begin with one of the following words: predict, suggest, construct, calculate o ...
... questions, candidates are required to use principles and concepts that are within the syllabus and apply them in a logical, reasoned or deductive manner to a novel situation. Questions testing these objectives will often begin with one of the following words: predict, suggest, construct, calculate o ...
Empirical and Molecular Formulas and Percentage Composition
... It is also necessary, when determining which technique to use, to consider what type of measurement is easiest to make or even feasible. Consider the chemical reaction below: C12(g) + 2KI(s) —> 2KCl(s) + I2 (l) You may at first think about the fact that one molecule of chlorine reacts with two formu ...
... It is also necessary, when determining which technique to use, to consider what type of measurement is easiest to make or even feasible. Consider the chemical reaction below: C12(g) + 2KI(s) —> 2KCl(s) + I2 (l) You may at first think about the fact that one molecule of chlorine reacts with two formu ...
Teaching to Standards: Science
... © 2008 Attainment Company, Inc. All rights reserved. Printed in the United States of America ISBN: 1-57861-662-X ...
... © 2008 Attainment Company, Inc. All rights reserved. Printed in the United States of America ISBN: 1-57861-662-X ...
Chapter 5 Chemical Equilibrium 1 State whether each of the
... (c) You should have found that Hvap is smaller at the higher temperature. Why is this so? This is because at higher temperature, the water molecules already have higher energy, so less is required to vaporize them from the liquid into the gas phase. ...
... (c) You should have found that Hvap is smaller at the higher temperature. Why is this so? This is because at higher temperature, the water molecules already have higher energy, so less is required to vaporize them from the liquid into the gas phase. ...
111 Review Outline TRO
... 4.48 g CO2 and 3.57 g KCl are produced along with some CaCl2 and H2O. Calculate the mass of the mixture. Ans: 11.10 g mixture 2. The percent of manganese in the compound, Mn5X2, is 42.10 %. What is the molar mass of element X ? Ans: 186.9 g/mole 3. A mixture of potassium phosphate and potassium nitr ...
... 4.48 g CO2 and 3.57 g KCl are produced along with some CaCl2 and H2O. Calculate the mass of the mixture. Ans: 11.10 g mixture 2. The percent of manganese in the compound, Mn5X2, is 42.10 %. What is the molar mass of element X ? Ans: 186.9 g/mole 3. A mixture of potassium phosphate and potassium nitr ...
Chapter 7. CHEMICAL REACTIONS
... been made and you will need to go back and check where something went wrong. ...
... been made and you will need to go back and check where something went wrong. ...
Theoretical Enthalpy
... listing the enthalpies of vaporization (∆Hvap), enthalpies of fusion (∆Hfus), enthalpies of reduction (∆Hred), enthalpies of combustion (∆Hcomb), etc… However, a much more useful table can be generated that lists the enthalpies of formation for any pure substance that allows us to calculate the expe ...
... listing the enthalpies of vaporization (∆Hvap), enthalpies of fusion (∆Hfus), enthalpies of reduction (∆Hred), enthalpies of combustion (∆Hcomb), etc… However, a much more useful table can be generated that lists the enthalpies of formation for any pure substance that allows us to calculate the expe ...
king fahd university of petroleum and minerals chemistry
... Write your student number, name, and section number on the EXAM COVER page. Write your student number, section number, and your name on your EXAM ANSWER FORM. Bubble in pencil your student number and your section number on the EXAM ANSWER FORM. Bubble in pencil on your EXAM ANSWER FORM the correct a ...
... Write your student number, name, and section number on the EXAM COVER page. Write your student number, section number, and your name on your EXAM ANSWER FORM. Bubble in pencil your student number and your section number on the EXAM ANSWER FORM. Bubble in pencil on your EXAM ANSWER FORM the correct a ...
F Practice Test #2 Solutions
... B) NiS will precipitate from solution. C) No reaction will occur. D) Both KNO3 and NiS precipitate from solution. E) KNO3 will precipitate from solution. 10. Which of the following statements concerning equilibrium is not true? A) The equilibrium constant is independent of temperature. B) The value ...
... B) NiS will precipitate from solution. C) No reaction will occur. D) Both KNO3 and NiS precipitate from solution. E) KNO3 will precipitate from solution. 10. Which of the following statements concerning equilibrium is not true? A) The equilibrium constant is independent of temperature. B) The value ...
L-12 Spontaneity of chemical reactions
... the first law does not deny the possibility that a metal bar having a uniform temperature can spontaneously become warmer at one end and cooler at the other. But it is known from experience that such a change does not occur without expenditure of energy from an external source. The first law also st ...
... the first law does not deny the possibility that a metal bar having a uniform temperature can spontaneously become warmer at one end and cooler at the other. But it is known from experience that such a change does not occur without expenditure of energy from an external source. The first law also st ...
Section A oxide in molten cryolite?
... What are the changes in the oxidation numbers of the two nitrogen atoms in NH4NO3 when this reaction proceeds? A –2, –4 B +2, +6 C +4, –6 D +4, –4 Q7 Aluminium is the most abundant metal in the Earth’s crust. The extraction of aluminium is carried out by the electrolysis of aluminium oxide dissolved ...
... What are the changes in the oxidation numbers of the two nitrogen atoms in NH4NO3 when this reaction proceeds? A –2, –4 B +2, +6 C +4, –6 D +4, –4 Q7 Aluminium is the most abundant metal in the Earth’s crust. The extraction of aluminium is carried out by the electrolysis of aluminium oxide dissolved ...
Section 1 Forming New Substances Chapter 9
... direction of the reaction. Reactions at equilibrium will have arrows facing both directions. Apply the Law of Conservation of Mass to get the same number of atoms of every element on each side of the equation. Tip: Start by balancing an element that appears in only one reactant and product. Once one ...
... direction of the reaction. Reactions at equilibrium will have arrows facing both directions. Apply the Law of Conservation of Mass to get the same number of atoms of every element on each side of the equation. Tip: Start by balancing an element that appears in only one reactant and product. Once one ...