17. What time is required to plate 2.08 g of copper at a constant current flow of 1.26 A? Atomic Molar Mass (A) Cu 41.8 min. 63.5 g.mol-¹ (B) Cu²+ (aq) + 2e Cu(s) (C) 83.6 min 128 min (D) 4820 min
17. What time is required to plate 2.08 g of copper at a constant current flow of 1.26 A? Atomic Molar Mass (A) Cu 41.8 min. 63.5 g.mol-¹ (B) Cu²+ (aq) + 2e Cu(s) (C) 83.6 min 128 min (D) 4820 min
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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I need help with questions 17-18? Could you explain which option is is correct for each answer?
![Bonding:
11. In which pair of compounds should the first member be more covalent than the second member?
(A) TICI, TIC13
(B) SnI4, SnF4 (C) LiF, BF3
(D) SnF4, CF4
12. Which is the most complete and best description of a covalent bond?
(A)a system of two nuclei with a pair of electrons located exactly midway between both nuclei
(B)the attractive force between two atoms of opposite charge
(C)a donor bond in which one atom donates an unshared pair to the other
(D)a system of two nuclei where each atom donates one electron to the other atom, thus forming a bond
13. Which pair of elements is most likely to react to form a covalently bonded species?
(B) Ca and O (C) K and S
(A) P and O
(D) Zn and C
14. Which chloride should exhibit the most covalent type of bond?
(A) NaCl (B) KCI (C) CaCl₂ (D) BaCl,
(E) BeCl₂
15. The compound of which two elements is most likely to involve covalent bonding?
Electronegativities of
Unknown Elements
(A)Q and Z
Q 0.9
1.0
R
T 2.8
(B)R and T
Cu
(A)
X 3.0
Z 4.0
Electrochemistry:
16. Chromium metal can be plated from an acidic solution of CrO3.
CrO3(aq) + 6H+ (aq) + 6e → Cr(s) + 3H₂O
How many grams of chromium will be plated by the passage of 19,300 C (coulombs)?
(A) 10.4 (B) 5.19 (C) 1.73 (D) 0.20
(C)T and X
17. What time is required to plate 2.08 g of copper at a constant current flow of 1.26 A?
Atomic Molar Mass
Ni
Ag
Cu
0.635 g
63.5 g.mol-¹
(D)R and X
(A) 41.8 min
(B)
83.6 min (C) 128 min
(D) 4820 min
18. Nickel is a transition element and has a variable valence. Using a nickel salt, 2 F (faradays) plate out
39.2 g of nickel. What ions are in the solution of this salt?
Atomic Molar Mass
(E)R and Z
58.7 g.mol-1
(A)
Ni+ (B) Ni²+ (C) Nj³+
(D) N₁2/3+
19. A given amount of electric charge deposits 2.159 g of silver from an Ag+ solution. What mass of
copper from a Cu²+ solution will be deposited by the same quantity of electric charge?
Atomic Molar Masses
107.9 g.mol-¹
63.5 g.mol-¹
(B)
Cu²+ (aq) + 2e Cu(s)
1.97 g (C) 2.54 g (D)
127 g
20. If each of these ions were reduced to metal with one coulomb, which would yield the greatest mass?
Cu²+ (aq) (B)
Hg2+ (aq)
Cu+ (aq)
(A)
Ag+ (aq) (C)
(D)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb95e059-8064-4379-9fc8-59ee0fd6d74c%2F13081161-e2a8-404a-a1df-47a4b6009abd%2Flk531dd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Bonding:
11. In which pair of compounds should the first member be more covalent than the second member?
(A) TICI, TIC13
(B) SnI4, SnF4 (C) LiF, BF3
(D) SnF4, CF4
12. Which is the most complete and best description of a covalent bond?
(A)a system of two nuclei with a pair of electrons located exactly midway between both nuclei
(B)the attractive force between two atoms of opposite charge
(C)a donor bond in which one atom donates an unshared pair to the other
(D)a system of two nuclei where each atom donates one electron to the other atom, thus forming a bond
13. Which pair of elements is most likely to react to form a covalently bonded species?
(B) Ca and O (C) K and S
(A) P and O
(D) Zn and C
14. Which chloride should exhibit the most covalent type of bond?
(A) NaCl (B) KCI (C) CaCl₂ (D) BaCl,
(E) BeCl₂
15. The compound of which two elements is most likely to involve covalent bonding?
Electronegativities of
Unknown Elements
(A)Q and Z
Q 0.9
1.0
R
T 2.8
(B)R and T
Cu
(A)
X 3.0
Z 4.0
Electrochemistry:
16. Chromium metal can be plated from an acidic solution of CrO3.
CrO3(aq) + 6H+ (aq) + 6e → Cr(s) + 3H₂O
How many grams of chromium will be plated by the passage of 19,300 C (coulombs)?
(A) 10.4 (B) 5.19 (C) 1.73 (D) 0.20
(C)T and X
17. What time is required to plate 2.08 g of copper at a constant current flow of 1.26 A?
Atomic Molar Mass
Ni
Ag
Cu
0.635 g
63.5 g.mol-¹
(D)R and X
(A) 41.8 min
(B)
83.6 min (C) 128 min
(D) 4820 min
18. Nickel is a transition element and has a variable valence. Using a nickel salt, 2 F (faradays) plate out
39.2 g of nickel. What ions are in the solution of this salt?
Atomic Molar Mass
(E)R and Z
58.7 g.mol-1
(A)
Ni+ (B) Ni²+ (C) Nj³+
(D) N₁2/3+
19. A given amount of electric charge deposits 2.159 g of silver from an Ag+ solution. What mass of
copper from a Cu²+ solution will be deposited by the same quantity of electric charge?
Atomic Molar Masses
107.9 g.mol-¹
63.5 g.mol-¹
(B)
Cu²+ (aq) + 2e Cu(s)
1.97 g (C) 2.54 g (D)
127 g
20. If each of these ions were reduced to metal with one coulomb, which would yield the greatest mass?
Cu²+ (aq) (B)
Hg2+ (aq)
Cu+ (aq)
(A)
Ag+ (aq) (C)
(D)
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