Part I - American Chemical Society
... The USNCO Subcommittee is conducting a survey in an effort to determine the impact of the Olympiad program on students. The first phase of this effort is represented by several questions added to the end of this year's exam, which should be answered on the same Scantron sheet students use for the ex ...
... The USNCO Subcommittee is conducting a survey in an effort to determine the impact of the Olympiad program on students. The first phase of this effort is represented by several questions added to the end of this year's exam, which should be answered on the same Scantron sheet students use for the ex ...
AS CHECKLISTS File
... State the formulae of the common acids: hydrochloric, sulfuric and nitric acids. State that common bases are metal oxides, metal hydroxides and ammonia. State that an alkali is a soluble base that releases OH– ions in aqueous solution. State the formulae of the common alkalis: sodium hydroxide, pota ...
... State the formulae of the common acids: hydrochloric, sulfuric and nitric acids. State that common bases are metal oxides, metal hydroxides and ammonia. State that an alkali is a soluble base that releases OH– ions in aqueous solution. State the formulae of the common alkalis: sodium hydroxide, pota ...
Document
... compounds, except when the other element is another halogen above it in the periodic table or the other element is oxygen. 6. Compounds and ions: The sum of the oxidation numbers of the atoms in a compound is zero. The sum of the oxidation numbers of the atoms in a polyatomic ion equals the charge o ...
... compounds, except when the other element is another halogen above it in the periodic table or the other element is oxygen. 6. Compounds and ions: The sum of the oxidation numbers of the atoms in a compound is zero. The sum of the oxidation numbers of the atoms in a polyatomic ion equals the charge o ...
1 - Intro to Electrochemistry
... Oxidation occurs when a substance _________ electrons during a chemical reaction Its oxidation number _____________________ (more on this later) Example: Cu(s) Cu2+ + 2 eReduction During reduction, a substance ____________ electrons during a chemical reaction The oxidation number of the substance ...
... Oxidation occurs when a substance _________ electrons during a chemical reaction Its oxidation number _____________________ (more on this later) Example: Cu(s) Cu2+ + 2 eReduction During reduction, a substance ____________ electrons during a chemical reaction The oxidation number of the substance ...
No Slide Title - McMaster Chemistry
... conjugate BASE are both present at the same time WEAK ACID: (acetic acid a.k.a. vinegar) CH3CO2H + H2O CH3CO2- (aq) + H3O+ (aq) WEAK BASE: NH3 (g) + H2O NH4+ (aq) + OH- (aq) 1A03/1E03 Types of Reactions (2) ...
... conjugate BASE are both present at the same time WEAK ACID: (acetic acid a.k.a. vinegar) CH3CO2H + H2O CH3CO2- (aq) + H3O+ (aq) WEAK BASE: NH3 (g) + H2O NH4+ (aq) + OH- (aq) 1A03/1E03 Types of Reactions (2) ...
Pauling Scale of Electronegativities for the Various Elements
... C12 → C131Step 4b: In KMnO4 manganese is at oxidation number +7 and will be reduced. If the solution is acidic, the Mn will go to a metallic oxidation number (+3 or +2). If the soluttion is basic, it goes to a nonmetallic oxidation number (+4, +6 or +7). H+ KMnO4 → Mn3+ (+3 is the first stable oxida ...
... C12 → C131Step 4b: In KMnO4 manganese is at oxidation number +7 and will be reduced. If the solution is acidic, the Mn will go to a metallic oxidation number (+3 or +2). If the soluttion is basic, it goes to a nonmetallic oxidation number (+4, +6 or +7). H+ KMnO4 → Mn3+ (+3 is the first stable oxida ...
the importance of electron transfer mechanism in
... rate constants for electronic excited states can be explained by the crossing between ionic and flat neutral potential energy surfaces. The inefficient reaction rates measured for ground states can be explained by the repulsive nature of 4s configuration which can result in a potential barrier. ...
... rate constants for electronic excited states can be explained by the crossing between ionic and flat neutral potential energy surfaces. The inefficient reaction rates measured for ground states can be explained by the repulsive nature of 4s configuration which can result in a potential barrier. ...
AS 2, Organic, Physical and Inorganic Chemistry
... (iii) Compare the enthalpy change obtained using average bond enthalpies to that using Hess’s Law and explain the difference. ...
... (iii) Compare the enthalpy change obtained using average bond enthalpies to that using Hess’s Law and explain the difference. ...
13. transition metal chemistry
... NOTE IUPAC gives the definition of a transition element as ‘An element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell.’ Elemental zinc does not contain an incomplete d sub-shell either ([Ar] 4s2 3d10) so can also be ruled out on the basis o ...
... NOTE IUPAC gives the definition of a transition element as ‘An element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell.’ Elemental zinc does not contain an incomplete d sub-shell either ([Ar] 4s2 3d10) so can also be ruled out on the basis o ...
pdfCfE Higher - Unit 3 - Pupil Booklet 2 MB
... quantities of reactants from step 1 there is not enough oxygen to allow all of the methane to react therefore some methane will be left over at the end. The methane is said to be in excess and the oxygen will therefore determine the quantity of carbon dioxide produced. ...
... quantities of reactants from step 1 there is not enough oxygen to allow all of the methane to react therefore some methane will be left over at the end. The methane is said to be in excess and the oxygen will therefore determine the quantity of carbon dioxide produced. ...
Document
... The standard entropy of a substance—its absolute entropy, S°—is the entropy value for the standard state of the species. The standard state is indicated with the superscript degree sign. For a pure substance, its standard state is 1 atm pressure. For a substance in solution, its standard state is a ...
... The standard entropy of a substance—its absolute entropy, S°—is the entropy value for the standard state of the species. The standard state is indicated with the superscript degree sign. For a pure substance, its standard state is 1 atm pressure. For a substance in solution, its standard state is a ...
Unit 9 Chemical Equations and Reactions Balancing Equations Notes
... Single Replacement- a metal will _________________ a less active metal in an ionic compound OR a nonmetal will replace a less active nonmetal. Double Replacement- the metals in ionic compounds _________________ places. Combustion- an ____________________ compound containing carbon, hydrogen and some ...
... Single Replacement- a metal will _________________ a less active metal in an ionic compound OR a nonmetal will replace a less active nonmetal. Double Replacement- the metals in ionic compounds _________________ places. Combustion- an ____________________ compound containing carbon, hydrogen and some ...
KEY + + - UIC Department of Chemistry
... Ba . All potassium salts are soluble. BaSO4 and PbSO4 are both insoluble. PbBr2 is also insoluble. The problem states that a precipitate forms ONLY when H2SO 4 is ...
... Ba . All potassium salts are soluble. BaSO4 and PbSO4 are both insoluble. PbBr2 is also insoluble. The problem states that a precipitate forms ONLY when H2SO 4 is ...
RxnTypesPrednotesIIAP
... Double replacement reaction generally fall under one of two categories - (1) acid-base neutralization reactions or (2) precipitation reactions. Many types of double replacement reactions are said to be reversible - that is, once the products are formed, they may turn back into the original reactants ...
... Double replacement reaction generally fall under one of two categories - (1) acid-base neutralization reactions or (2) precipitation reactions. Many types of double replacement reactions are said to be reversible - that is, once the products are formed, they may turn back into the original reactants ...
H + H–H H∙∙∙∙∙∙∙∙∙ H∙∙∙∙∙∙H H∙∙∙∙∙∙H∙∙∙∙∙∙H
... This process can be generalized as: A + B-C [ABC] A-B + C Activated complex Transition state ...
... This process can be generalized as: A + B-C [ABC] A-B + C Activated complex Transition state ...
Matter and Measurement
... The standard enthalpy of formation (DHfo) of a compound is defined as the enthalpy change for the reaction that forms 1 mole of compound from its elements, with all substances in their standard states. ...
... The standard enthalpy of formation (DHfo) of a compound is defined as the enthalpy change for the reaction that forms 1 mole of compound from its elements, with all substances in their standard states. ...
Catalysis
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst. With a catalyst, reactions occur faster and require less activation energy. Because catalysts are not consumed in the catalyzed reaction, they can continue to catalyze the reaction of further quantities of reactant. Often only tiny amounts are required.