2014 Academic Challenge Sectional Chemistry Exam Solution Set 1
... B. An isoelectronic series contains atoms & ions with the exact same number of electrons in the same orbitals. The only way a species can be neutral is if it has the same number of protons as electrons. Therefore for any given series, only one species maybe neutral, the element with an atomic number ...
... B. An isoelectronic series contains atoms & ions with the exact same number of electrons in the same orbitals. The only way a species can be neutral is if it has the same number of protons as electrons. Therefore for any given series, only one species maybe neutral, the element with an atomic number ...
Chapter 1.1 –Chemistry is a Physical Science Chemistry is one of
... Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C12H22O11), water (H2O), iron (Fe), copper (Cu), and oxygen (O2). ...
... Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C12H22O11), water (H2O), iron (Fe), copper (Cu), and oxygen (O2). ...
Chapter 6 One-Electron Reduction Potentials of Aqueous Co2+
... experimental apparatus is described in detail elsewhere, and has been modified by incorporating a 7.0 T magnet and improved vacuum chamber. 45,55-57 Briefly, hydrated metal ion clusters are generated from 5 – 10 mM aqueous solutions containing the metal salts (CoSO 4, NiCl2, CuSO4, or ZnCl2) using n ...
... experimental apparatus is described in detail elsewhere, and has been modified by incorporating a 7.0 T magnet and improved vacuum chamber. 45,55-57 Briefly, hydrated metal ion clusters are generated from 5 – 10 mM aqueous solutions containing the metal salts (CoSO 4, NiCl2, CuSO4, or ZnCl2) using n ...
ap chemistry syllabus - West Essex High School
... Explain electronegativity, how it varies on the periodic table, and its relationship to the nature of the bond between two atoms. Predict the polarities of bonds between any two atoms from their electonegativities or their positions on the periodic table. VIII. Covalent Bonding and Orbitals (Chapte ...
... Explain electronegativity, how it varies on the periodic table, and its relationship to the nature of the bond between two atoms. Predict the polarities of bonds between any two atoms from their electonegativities or their positions on the periodic table. VIII. Covalent Bonding and Orbitals (Chapte ...
Stoichiometry
... Two compounds are involved with the cation of one compound EXCHANGING with the cation of another compound. AX + BZ AZ + BX These reactions proceed if one of the ff. is satisfied: 1. An insoluble/slightly soluble product is formed (PRECIPITATE formation) 2. A weakly ionized species is produced. The ...
... Two compounds are involved with the cation of one compound EXCHANGING with the cation of another compound. AX + BZ AZ + BX These reactions proceed if one of the ff. is satisfied: 1. An insoluble/slightly soluble product is formed (PRECIPITATE formation) 2. A weakly ionized species is produced. The ...
Review Packet - Daigneault Chem.is.try
... Chapter 3: Elements, Atoms, and Ions; Atomic Theory 1. Compare the parts of an atom based on location, charge and mass: - proton - neutron - electron 2. Define: - isotope - ion - atomic number - mass number - atomic mass unit 3. How many neutrons does U-238 have? 4. Write isotope notation for the pa ...
... Chapter 3: Elements, Atoms, and Ions; Atomic Theory 1. Compare the parts of an atom based on location, charge and mass: - proton - neutron - electron 2. Define: - isotope - ion - atomic number - mass number - atomic mass unit 3. How many neutrons does U-238 have? 4. Write isotope notation for the pa ...
GENERAL CHEMISTRY REVIEW
... Binary Ionic Compounds, where the metal ion has variable oxidation state (Transition elements) 1. the oxidation state on the metal ion is specified by Roman Numeral in brackets 2. monoatomic anions are named as before For example, CuCl and CuCl2 are named as copper (I) chloride and copper (II) chlor ...
... Binary Ionic Compounds, where the metal ion has variable oxidation state (Transition elements) 1. the oxidation state on the metal ion is specified by Roman Numeral in brackets 2. monoatomic anions are named as before For example, CuCl and CuCl2 are named as copper (I) chloride and copper (II) chlor ...
NH 4 1+
... But what does it mean that HNO3 is strong, but HF is weak? It means that when HNO3 molecules are dissolved in water, they break apart 100% like this: But when HF molecules are dissolved in water, only a relatively small percentage of them break apart into ions: H ...
... But what does it mean that HNO3 is strong, but HF is weak? It means that when HNO3 molecules are dissolved in water, they break apart 100% like this: But when HF molecules are dissolved in water, only a relatively small percentage of them break apart into ions: H ...
Final Exam Practice Problems: R = 0.0821 Latm/molK NA = 6.022
... A) Li+ (aq) + SO42-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + Li+(aq) + NO3-(aq) B) Li+ (aq) + S-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + LiNO3(aq) C) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → Cu2+(aq) + S2-(aq) + 2 LiNO3(s) D) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq) ...
... A) Li+ (aq) + SO42-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + Li+(aq) + NO3-(aq) B) Li+ (aq) + S-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + LiNO3(aq) C) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → Cu2+(aq) + S2-(aq) + 2 LiNO3(s) D) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq) ...
Chapter 12 Oxidation-Reduction Reactions
... 2. Balance each of the following ionic equations for basic conditions. Identify the oxidizing agent and the reducing agent in each case: a) MnO4−(aq) + I−(aq)→ MnO42−(aq) + IO3−(aq) b) H2O2(aq) + ClO2(aq) → ClO−(aq) + O2(g) c) ClO−(aq) + CrO2−(aq) → CrO42−(aq) + Cl2(g) d) Al(s) + NO−(aq) → NH3(g) + ...
... 2. Balance each of the following ionic equations for basic conditions. Identify the oxidizing agent and the reducing agent in each case: a) MnO4−(aq) + I−(aq)→ MnO42−(aq) + IO3−(aq) b) H2O2(aq) + ClO2(aq) → ClO−(aq) + O2(g) c) ClO−(aq) + CrO2−(aq) → CrO42−(aq) + Cl2(g) d) Al(s) + NO−(aq) → NH3(g) + ...
Review Questions for 1st year chemistry
... and 16), but the same number of protons (7). To find the neutrons, calculate mass minus protons. ...
... and 16), but the same number of protons (7). To find the neutrons, calculate mass minus protons. ...
Chapter 10
... will occur between the following pairs of possible reactants. If so, write the balanced chemical equation for the reaction. Chlorine gas and aqueous potassium iodide Magnesium metal and aqueous copper (II) ...
... will occur between the following pairs of possible reactants. If so, write the balanced chemical equation for the reaction. Chlorine gas and aqueous potassium iodide Magnesium metal and aqueous copper (II) ...
Preview Sample 1
... 8) The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen? A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. B) The nitrogen atom has a mass number of approximately 14 daltons and a ...
... 8) The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen? A) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14. B) The nitrogen atom has a mass number of approximately 14 daltons and a ...
Atomic Structure
... Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ ...
... Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ ...
Lesson 4.4 acid base reactions
... Start by writing the molecular equation showing the acid and base reactants and the salt product. Recall that the salt consists of cations from the base and anions from the acid. Note also that water is usually a product; if it is you will not be able to balance the equation without it. Once you ha ...
... Start by writing the molecular equation showing the acid and base reactants and the salt product. Recall that the salt consists of cations from the base and anions from the acid. Note also that water is usually a product; if it is you will not be able to balance the equation without it. Once you ha ...
Note
... B. the metallic atom(s) gives one or more electrons to the non-metallic atom(s) so that the atoms become charged ions C. metallic ions are positively charged and non-metallic ions are negatively charged D. because the ions are oppositely charged, they attract each other negatively charged ions are ...
... B. the metallic atom(s) gives one or more electrons to the non-metallic atom(s) so that the atoms become charged ions C. metallic ions are positively charged and non-metallic ions are negatively charged D. because the ions are oppositely charged, they attract each other negatively charged ions are ...
Measuring polyelectrolyte charges using a colloidal charge sensor
... based on a thermodynamic principle called the Donnan equilibrium. Simply put, this method works by determining the concentration of counterions of the charged colloids. If the number density of the colloids is known, the charge is straightforward to calculate. In this project, you will be systematic ...
... based on a thermodynamic principle called the Donnan equilibrium. Simply put, this method works by determining the concentration of counterions of the charged colloids. If the number density of the colloids is known, the charge is straightforward to calculate. In this project, you will be systematic ...
Document
... One cannot weigh a single atom, but it is possible to determine the mass of one atom relative to another ...
... One cannot weigh a single atom, but it is possible to determine the mass of one atom relative to another ...
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: ...
Molecular Compound
... • Most of the rocks and minerals that make up Earth’s crust consist of positive and negative ions held together by ionic bonding • example: table salt, NaCl, consists of sodium and chloride ions combined in a one-to-one ratio—Na+Cl– —so that each positive charge is balanced by a negative charge • Io ...
... • Most of the rocks and minerals that make up Earth’s crust consist of positive and negative ions held together by ionic bonding • example: table salt, NaCl, consists of sodium and chloride ions combined in a one-to-one ratio—Na+Cl– —so that each positive charge is balanced by a negative charge • Io ...
Household Acids and Bases Lab
... Household Acids and Bases Lab Introduction A visual indicator is a chemical substance that reflects the nature of the chemical system in which it is placed by changing color. Most visual indicators are complex organic molecules that exist in multiple colored forms, one of which could be colorless, d ...
... Household Acids and Bases Lab Introduction A visual indicator is a chemical substance that reflects the nature of the chemical system in which it is placed by changing color. Most visual indicators are complex organic molecules that exist in multiple colored forms, one of which could be colorless, d ...
Balancing Equations
... Escaping gas () Change of temperature/ heat energy ( or + 3kJ or – 3kJ) *there is no subtraction…a ...
... Escaping gas () Change of temperature/ heat energy ( or + 3kJ or – 3kJ) *there is no subtraction…a ...
Slide 1
... Lecture 15 The Redox Sequence Oxidation State Half-Reactions Balanced Oxidation-Reduction reactions Predicted Sequence of Redox Reactions Tracers for these reactions ...
... Lecture 15 The Redox Sequence Oxidation State Half-Reactions Balanced Oxidation-Reduction reactions Predicted Sequence of Redox Reactions Tracers for these reactions ...
Fundamentals of Chemistry
... atom is an extremely small electrically-neutral particle. It is the smallest unit involved in the chemical change of matter. Atoms can be treated as distinct particles because they behave as such chemically, but atoms themselves are composed of even smaller subparts. Understanding these atomic subpa ...
... atom is an extremely small electrically-neutral particle. It is the smallest unit involved in the chemical change of matter. Atoms can be treated as distinct particles because they behave as such chemically, but atoms themselves are composed of even smaller subparts. Understanding these atomic subpa ...