1. Third Nine Weeks- 9 weeks review
JEOPARDY
Third Nine Weeks-
9 weeks review

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3. Which of the following are found in pure water? A hydroxide ions
B hydronium ions
C water molecules
D all of these
A: D. all of these
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4. What is the concentration of H3O+ in pure water at 25 °C. F 10-7 M G 7
What is the concentration of H3O+ in pure water at 25 °C? F 10-7 M G 7.0 M H 10.7 M J 107 M
A: F. 10 ^-7
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5. An aqueous solution of sodium hydroxide reacts completely with a solution of hydrochloric acid. After all the water evaporates from the reaction mixture, what will remain? F sodium chloride G chlorohydroxide H sodium oxide J sodium chlorate
A: F. sodium chloride
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6. What is the most common oxidation number of combined sodium
What is the most common oxidation number of combined sodium? F 2 G 1 H 0 J +1
A: J. +1
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7. In balanced chemical equations, the sum of all the oxidation numbers is — A half of the number of elements B always +1 C always –1 D always zero0
A: D. always zero
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8. In the reaction 2K + Cl2 → 2K+ + 2 Cl which element(s) is/are reduced
In the reaction 2K + Cl2 → 2K+ + 2 Cl which element(s) is/are reduced? F K only G Cl2 only H both K and Cl2 J neither K nor Cl2
A: G.) Cl2 only
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9. What are the oxidation numbers in the compound H2SO4. A
What are the oxidation numbers in the compound H2SO4?   A.) H = +1, S = 0, O = 2 B.) H = +1, S = +6, O = -2 C.) H = -1, S = +7, O = 1 D.) H = +1, S = +1, O = 1
A: B.
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10. What are the oxidation numbers in the compound NaCl
What are the oxidation numbers in the compound NaCl? A Na = 0, Cl = 0 B Na = +1, Cl = -1 C Na = 1, Cl = +1 D Na = +2, Cl = 2
A: B.)
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11. Which of the following statements is correct regarding oxidation and reduction processes? A Oxidation decreases the oxidation number. B Oxidation increases the oxidation number. C Reduction increases the oxidation number. D Oxidation and reduction have no effect on the oxidation numbers.I 400
A: B.
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12. Which must be present for a piece of iron to rust
Which must be present for a piece of iron to rust? A carbon B chlorine C oxygen D sodium 500
A: C.) oxygen
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13. In a redox reaction, the chemical which gains electrons is called the — A oxidizing agent B neutralizer C reducing agent D releasing agent TH
A: A
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14. What is the pH of a basic solution
A: above 7
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15. For two acids of equal concentration, the stronger acid has — A a higher concentration of hydroxide ions B a higher pH C a higher concentration of hydronium ions D a stronger bond
A: C.
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16. Which of the following is used to calculate the average atomic mass of an element? F the naturally occurring isotopes G the five most abundant isotopes H the isotopes that are man made J the least common isotopes H
A: F. the naturally occurring isotopes
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17.  How should the students check to make sure that the liquid in the beaker at the start is really the acid instead of the base? F Taste it to make sure it is sour. G Feel it between their fingers, bases are slick. H Check the pH meter reading. J Use all of the above to make sure.
A: H.
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18. A sample of fruit juice is found to have a hydrogen ion concentration of 2.87 x What would the pH be? F 2.87 G 3.54 H 4.58 J 8.16
A. G.
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19. What is the correct net ionic equation for the following formula: Na2CO3(aq) + 1 FeCl2(aq)  1 FeCO3(s) + 2 NaCl(aq) A. Na+ + Cl- → NaCl B. 2Na+ + 2Cl- → 2NaCl C. Fe +2 + CO3 -2 → FeCO3 D. Fe+ + CO3- → FeCO3 A
A. C.
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20. What is the net ionic equation for the equation below: 1 Mg(OH)2(aq) + 2 HCl(aq)  1 MgCl2(aq) + 2 H2O(l)
A: 2 H+ (aq) + 2 OH- (aq)  2 H2O
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21. What is the pH of an acidic solution
A: below a 7
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22. What is the pH and pOH for the given number [H+] = 2.0 x 10-3 M =
A: pH= pOH= 11.3
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23. What is the pH of a solution that has a pOH of 3.2?
A: pH= 10.8
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24. What is the pH of a neutral substance?
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25. What is the pOH of a solution if the [H+] is 3. 4 x 10-5M
What is the pOH of a solution if the [H+] is 3.4 x 10-5M? ______________ Is it an acid, base or neutral substance? T
A: 9.53, Acid
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26. Acids turn blue litmus paper ________________
A: red
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27. Bases turn red litmus paper __________________.C
A: Blue
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