Review_Biol 1308 Unit Exam II_spring 2017.docx

The direction of the reaction from the reactants left

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the direction of the reaction from the reactants (left) to the product (right) 5.When given a reaction (either in general terms or with specific reactants and products), be able to determine whether chemical bonds are being broken or formed. (Try the examples below) 8Fe + 4S 2 8FeS _________________________ 2H 2 O 2H 2 + O 2 _________________________ 6.When given a simple chemical reaction, identify the reactant(s) and product(s). (Try the examples below.) a. 2H 2 + O 2 2H 2 O b. C 3 H 8 + 5O 2 3CO 2 + 4 H 2 O c. NH 3 + 5O 2 4NO + 6H 2 O 7.Define the term reversible reaction. when chemical reactions occur in both directions 8. Draw and be able to recognize the type of arrow used in a reversible reaction. double headed arrow -------------------- 6 Biol 1308
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9. Describe the factors that determine which way a reversible reaction will proceed (be sure to include and define the term chemical equilibrium in your description). which way it will go: When reactant concentrations are high, they frequently collide to create product. As products accumulate, they begin to collide, forming reactants chemical equilibrium: when the rate of formation of products is the same as the rate of breakdown of products 10.Define each of the following terms: combination reaction: -two or more reactants combine to form a single product -they must collide just right in order to combine ex: CO2 + H2O H2CO3 decomposition reaction: -a compound breaks down into its component parts- the opposite of combination reaction ex: H2CO3 CO2 + H2O replacement reaction: -the reactants combine to form new products ex: NaCl + AgNO3 NaNO3 + AgCl 11.When given a reaction, identify it as a combination reaction, decomposition reaction, or replacement reaction. (Try the examples below.) a. 2H 2 O 2H 2 + O 2 ______________________________ b. 2H 2 + O 2 2H 2 O ______________________________ c. C 3 H 8 + 5O 2 3CO 2 + 4 H 2 O ______________________________ d. NH 3 + 5O 2 4NO + 6H 2 O ______________________________ 12.Define the following terms in relation to chemical reactions: coefficient: the number in front subscript: the number after the molecule 13.When given a chemical reaction, be able to identify the coefficient and subscript of each reactant and product. (Try the example below.) C 3 H 8 + 5O 2 3CO 2 + 4 H 2 O 7 Biol 1308
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14.When given a simple chemical reaction, be able to balance the chemical equation. (Try the sample problems below.) a. ____ C 3 H 8 + _____ O 2 _____ CO 2 + _____ H 2 O b. _____ NH 3 + _____O 2 _____ NO + _____ H 2 O c. ______ Al + ______Fe 2 O 3 _____Al 2 O 3 + ______Fe Objectives Module 3.3 Acids, Bases, pH, and Buffers 1. Identify the number of protons, neutrons, and electrons in the most common type of hydrogen atom: - 1 proton - 1 electon - 0 neutrons 2. State the alternative name for a hydrogen ion. H+ - has lost an electron, so is called proton 3. Define the following terms: dissociation: the splitting of a molecule into smaller parts like ions ionization: the formation of ions 4. Write the equation that summarizes the dissociation/ionization of water. 5. Define the term acid . a substance that dissociates in water and increases the [H+] in the solution 6. Identify examples of acids in our everyday lives. citrus fruits, coffee, soda 7. Differentiate strong acids from weak acids in terms of dissociation.
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