Chemistry 2008–2012 Written examination – November Examination Specifications
... SECTION B – Short answer questions Instructions for Section B Answer all questions in the spaces provided. To obtain full marks for your responses you should • give simpliÞed answers with an appropriate number of signiÞcant Þgures to all numerical questions; unsimpliÞed answers will not be given ful ...
... SECTION B – Short answer questions Instructions for Section B Answer all questions in the spaces provided. To obtain full marks for your responses you should • give simpliÞed answers with an appropriate number of signiÞcant Þgures to all numerical questions; unsimpliÞed answers will not be given ful ...
1999 Advanced Placement Chemistry Exam
... (A) accepts a proton from water at the original equilibrium? (B) accepts a pair of electrons to form a bond (A) Keq for the reaction (C) donates a pair of electrons to form a bond (B) The total pressure in the reaction vessel (D) donates a proton to water (C) The amount of SO3(g) in the reaction ves ...
... (A) accepts a proton from water at the original equilibrium? (B) accepts a pair of electrons to form a bond (A) Keq for the reaction (C) donates a pair of electrons to form a bond (B) The total pressure in the reaction vessel (D) donates a proton to water (C) The amount of SO3(g) in the reaction ves ...
5H2O → CuSO4 + 5H2O(g)
... ◦ Precipitation: insoluble (solid) product is formed from aqueous solutions ◦ Acid-base neutralization: acid and base react to form water and a salt (ionic compound) ◦ Oxidation-Reduction: electrons are transferred between atoms in reaction Combination Decomposition Single-replacement (metal o ...
... ◦ Precipitation: insoluble (solid) product is formed from aqueous solutions ◦ Acid-base neutralization: acid and base react to form water and a salt (ionic compound) ◦ Oxidation-Reduction: electrons are transferred between atoms in reaction Combination Decomposition Single-replacement (metal o ...
Structure of Molecules and Compounds | Principles of Biology from
... chemical reaction. The reactants in a cake may include flour, sugar, butter, and eggs. In a chemical reaction, the ingredients are elements or compounds. The reactants combine during the chemical reaction to form the product. In the cake analogy, the product is the cake. In a chemical reaction, the ...
... chemical reaction. The reactants in a cake may include flour, sugar, butter, and eggs. In a chemical reaction, the ingredients are elements or compounds. The reactants combine during the chemical reaction to form the product. In the cake analogy, the product is the cake. In a chemical reaction, the ...
Oxidation of benzoin with anchored vanadyl and
... carried out in the absence of catalyst, was very slow and low yields of benzil were obtained even when the reaction was allowed to proceed for a longer time (up to 32 h). Experiments were carried out using (i) the organic polymer without ligand and metal complex and (ii) the organic polymer function ...
... carried out in the absence of catalyst, was very slow and low yields of benzil were obtained even when the reaction was allowed to proceed for a longer time (up to 32 h). Experiments were carried out using (i) the organic polymer without ligand and metal complex and (ii) the organic polymer function ...
chapter 6: chemical reactions: an introduction
... The starting materials are called reactants and are shown on the left side of the chemical equation. The substances formed in a reaction are called products and are shown on the right side of the equation. The same kinds of atoms must be present before and after a chemical reaction because atoms are ...
... The starting materials are called reactants and are shown on the left side of the chemical equation. The substances formed in a reaction are called products and are shown on the right side of the equation. The same kinds of atoms must be present before and after a chemical reaction because atoms are ...
Review AGº = -RTlnKº Calculate the equilibrium constant Kc at 25 ºC
... number of each agent. The reducing agent decreases (reduces) the oxidation number of its partner agent. The oxidizing agent increases the oxidation number of its partner agent. reduction: a partial process, known as a halfreaction, in which electrons are gained and oxidation number decreases. oxidat ...
... number of each agent. The reducing agent decreases (reduces) the oxidation number of its partner agent. The oxidizing agent increases the oxidation number of its partner agent. reduction: a partial process, known as a halfreaction, in which electrons are gained and oxidation number decreases. oxidat ...
A.P. Chemistry Writing Chemical Reactions Generally students do
... potential table. Since there are no “no reactions” on this portion of the exam, the point is more or less moot. As a generalization, the metal with the more positive reduction potential will be replaced. For halogens, the displacement order follows the periodic table, fluorine being the most active. ...
... potential table. Since there are no “no reactions” on this portion of the exam, the point is more or less moot. As a generalization, the metal with the more positive reduction potential will be replaced. For halogens, the displacement order follows the periodic table, fluorine being the most active. ...
AP Chemistry
... o balance O, by adding H2O o balance H, by adding H+ o balance charge, by adding e multiple half-reactions to equalize electrons ...
... o balance O, by adding H2O o balance H, by adding H+ o balance charge, by adding e multiple half-reactions to equalize electrons ...
Writing Chemical Reactions
... potential table. Since there are no “no reactions” on this portion of the exam, the point is more or less moot. As a generalization, the metal with the more positive reduction potential will be replaced. For halogens, the displacement order follows the periodic table, fluorine being the most active. ...
... potential table. Since there are no “no reactions” on this portion of the exam, the point is more or less moot. As a generalization, the metal with the more positive reduction potential will be replaced. For halogens, the displacement order follows the periodic table, fluorine being the most active. ...
Answers to Selected Problems
... 75. A person who is educated in the theories and practice of chemistry is more likely to recognize the significance of an accidental discovery and have the means and motivation to develop that accidental discovery into an important scientific contribution. ...
... 75. A person who is educated in the theories and practice of chemistry is more likely to recognize the significance of an accidental discovery and have the means and motivation to develop that accidental discovery into an important scientific contribution. ...
Unit 13: Electrochemistry (Link to Prentice Hall Text: Chapters 22
... Why would you ever want to force a nonspontaneous reaction? (a) To obtain pure metals Many metals are only found as compounds in nature. Electrolysis can lead to a deposit of the pure metal on the cathode. (b) To recharge a battery A car battery powers the car through a spontaneous reaction, but wha ...
... Why would you ever want to force a nonspontaneous reaction? (a) To obtain pure metals Many metals are only found as compounds in nature. Electrolysis can lead to a deposit of the pure metal on the cathode. (b) To recharge a battery A car battery powers the car through a spontaneous reaction, but wha ...
2005 - NESACS
... 19. When the Co2+ ion is placed in a strong octahedral crystal field such as Co(CN)64_ the number of unpaired electrons is: (A) (B) (C) (D) ...
... 19. When the Co2+ ion is placed in a strong octahedral crystal field such as Co(CN)64_ the number of unpaired electrons is: (A) (B) (C) (D) ...
mole concept and stoichiometry
... 2.5 Gay Lussac’s Law of combining Volumes Sir Gay Lussac found the relationship existing between the volumes of the gaseous reactants and their products. In 1808, he put forward a generalization known as the Gay Lussac’s Law of combining volumes. According to this Law “When gases react together, the ...
... 2.5 Gay Lussac’s Law of combining Volumes Sir Gay Lussac found the relationship existing between the volumes of the gaseous reactants and their products. In 1808, he put forward a generalization known as the Gay Lussac’s Law of combining volumes. According to this Law “When gases react together, the ...
8.3 Metals - UNSW Chemistry
... "Describe an ancient metal extraction process and recount the separation and or decomposition processes involved". All these topics should be studied at the same time as they are so obviously related. Useful to consider the metals as they were discovered, and emphasise that as methods of extraction ...
... "Describe an ancient metal extraction process and recount the separation and or decomposition processes involved". All these topics should be studied at the same time as they are so obviously related. Useful to consider the metals as they were discovered, and emphasise that as methods of extraction ...
LESSON ASSIGNMENT LESSON 2 Elements of Chemical Change
... (1) Calculating the gram molecular weight. One-gram molecular weight of a substance is its molecular weight expressed in grams. Thus, a GMW of NaOH would be 40 grams, where the atomic weights are as follows: Na = 23, O = 16, and H = 1. Thus, .5 GMW of NaOH would be 20 grams, and so forth. A mole is ...
... (1) Calculating the gram molecular weight. One-gram molecular weight of a substance is its molecular weight expressed in grams. Thus, a GMW of NaOH would be 40 grams, where the atomic weights are as follows: Na = 23, O = 16, and H = 1. Thus, .5 GMW of NaOH would be 20 grams, and so forth. A mole is ...
Topic 1 Review - Capital High School
... C. Each magnesium atom loses two electrons and each chlorine atom gains one electron. D. Each magnesium atom gains one electron and each chlorine atom loses two electrons. 6. Which is the best description of ionic bonding? A. The electrostatic attraction between positively charged nuclei and an elec ...
... C. Each magnesium atom loses two electrons and each chlorine atom gains one electron. D. Each magnesium atom gains one electron and each chlorine atom loses two electrons. 6. Which is the best description of ionic bonding? A. The electrostatic attraction between positively charged nuclei and an elec ...
15.2 Electrons and Chemical Bonds
... You can think of valence electrons as the outer “skin” of an atom. Electrons in the inner (filled) energy levels do not “see” other atoms because they are shielded by the valence electrons. For example, chlorine has 7 valence electrons. The first 10 of chlorine’s 17 electrons are in the inner (fille ...
... You can think of valence electrons as the outer “skin” of an atom. Electrons in the inner (filled) energy levels do not “see” other atoms because they are shielded by the valence electrons. For example, chlorine has 7 valence electrons. The first 10 of chlorine’s 17 electrons are in the inner (fille ...
Water splitting
Water splitting is the general term for a chemical reaction in which water is separated into oxygen and hydrogen. Efficient and economical water splitting would be a key technology component of a hydrogen economy. Various techniques for water splitting have been issued in water splitting patents in the United States. In photosynthesis, water splitting donates electrons to power the electron transport chain in photosystem II.