2008_Summer_Chem2_Ex2_key

2008_Summer_Chem2_Ex - Chemistry 2 Summer 2008 Exam 2 Key Chapters 6(part 7-10 Answer the following by writing the word words letter letters or

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1 Chemistry 2 Summer 2008 Exam 2 Key Chapters 6(part), 7-10 Answer the following by writing the word, words, letter, letters or number in each blank that best completes each sentence. (1 point each) 1. A(n) weak acid is a substance that is incompletely ionized in water due to the reversibility of the reaction that forms hydronium ions, H 3 O + , in water. They yield significantly less than one H 3 O + ion in solution for each acid molecule dissolved in water. 2. A(n) formula unit is a group represented by a substance’s chemical formula—that is, a group containing the kinds and numbers of atoms or ions listed in the chemical formula. It is a general term that can be used in reference to elements, molecular compounds, or ionic compounds. 3. A(n) empirical formula is a chemical formula that includes positive integers that describe the simplest ratio of the atoms of each element in a compound. 4. A(n) solution is a mixture whose particles are so evenly distributed that the relative concentrations of the components are the same throughout. Solutions can also be called homogeneous mixtures. 5. A(n) net ionic equation is a chemical equation for which the spectator ions have been eliminated, leaving only the substances actively involved in the reaction. 6. A(n) exothermic change is a change that leads to heat energy being released from the system to the surroundings. 7. A(n) strong base is a substance that generates at least one hydroxide ion in solution for every unit of substance added to water. 8. Oxidation is any chemical change in which at least one element loses electrons, either completely or partially. 9. A(n) anode is the electrode at which oxidation occurs in a voltaic cell. It is the source of electrons and is the negative electrode. 10. A(n) electrolyte is the portion of a voltaic cell that allows ions to flow.
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2 11. A(n) primary battery is a battery that is not rechargeable. 12. Electrolysis is the process by which a redox reaction is pushed in the nonspontaneous direction or the process of applying an external voltage to a voltaic cell, causing electrons to move from what would normally be the cell’s cathode toward its anode. Answer the following by writing one of these words or phrases in each blank. (1/2 point each) 10-fold heat rarely above higher red acceptor homogeneous mixture reduced acidic ions reduction amphoteric isotopes released basic less than 7 single blue light solute complete formula lower solvent continuous molecules sour delta, Δ oxidation transfer donor oxidized water greater than 7 13. Any substance that has a(n) sour taste is an acid. 14. On the basis of the Arrhenius definitions, a(n) acidic solution is a solution with a significant concentration of H 3 O + . 15. The chemical equations for completion reactions are written with single arrows to indicate that the reaction proceeds to form almost 100% products.
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This note was uploaded on 03/03/2012 for the course CHEM 100 taught by Professor Mark during the Fall '06 term at Monterey Peninsula College.

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2008_Summer_Chem2_Ex - Chemistry 2 Summer 2008 Exam 2 Key Chapters 6(part 7-10 Answer the following by writing the word words letter letters or

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