![Question 5 (1 point) Saved In the reaction Cr(NO3)3(aq) + 6H2O(1) – [Cr(H20)6]3+(aq) + 3NO3(aq) (Hint: try drawing the Lewis](http://img.homeworklib.com/questions/2afc1250-0799-11ea-a9fc-c1e4c4c71c13.png?x-oss-process=image/resize,w_560)
Homework Answers
In the given reaction, NO3- ions of Cr(NO3)2 are replaced by H2O molecule.
Step 1: Each Oxygen atom of water molecule contains, two lone pair of electrons, and which it donates to the acceptor, hence H2O is a Lewis base.
Step 2: The atomic number of Cr is 24
Ground state electronic configuration of Cr = [Ar] 4S1 3d5
Electronic configuration of Cr+3 = [Ar] 4S0 3d3
Due to the presence of empty d-orbitals, Cr accepts electrons from water molecule and develops coordinate covalent bond.
Since, Cr+3, accepts electrons, it is a Lewis acid.
Hence, among the given options, first option is correct.
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Question 5 (1 point) Saved In the reaction Cr(NO3)3(aq) + 6H2O(1) – [Cr(H20)6]3+(aq) + 3NO3"(aq) (Hint: try drawing...
Part B Using the Brønsted-Lowry concept of acids and bases, identify the Brønsted-Lowry acid and base...
Part B Using the Brønsted-Lowry concept of acids and bases, identify the Brønsted-Lowry acid and base in each of the following reactions: HSO4 (aq) + H2O(1)+H2SO4 (aq) + OH(aq) (CH3),N(g) + BC13 (8)—-(CH3)2NBC13 (3) Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help H50, (wa) 1:00 (CH), Now) Balcon) Brønsted-Lowry acid Brønsted-Lowry base Neither Using the Lewis concept of acids and bases, identify the Lewis acid and base in each of the following reactions: Co(NO3)3(s) +...
estion 10 of 65 > Consider the reaction. HF(aq) + KOH(aq) — KF(aq) + H20(1) What...
estion 10 of 65 > Consider the reaction. HF(aq) + KOH(aq) — KF(aq) + H20(1) What is the net ionic equation for the chemical reaction? HF(aq) + K+(aq) + OH(aq) — K+(aq) + F (aq) + H2O(1) O HF(aq) + K+(aq) + OH-(aq) — K+(aq) + F (aq) + H+(1) + OH-(1) O HF(aq) + OH-(aq) —> F-(aq) + H2O(1) HF(aq) + K+(aq) F (aq) + H+(1) HF(aq) + K+(aq) K+(aq) + H2O(1) - 11 of 65 > Calculate either...
2. Write chemical equations to explain the following observations: (a) When Cr(NO3)3 is dissolved in H20...
2. Write chemical equations to explain the following observations: (a) When Cr(NO3)3 is dissolved in H20 the pH of the solution decreases thus becomes more acidic (Hint first consider forming the complex Cr(H20)63 and then consider what happen to this complex in water... I gave a similar example in the lectures) |(b) A precipitate of Al(OH)3 is redissolved with a basic solution containing lots of OH (6M KOH). (hint: what do you make here when Al(OH)3 combines with OH-? Check...
is thos correct? Question 1 (1 point) Saved Given: NO3(aq) --> NH3(aq), basic solution. How many...
is thos correct?
Question 1 (1 point) Saved Given: NO3(aq) --> NH3(aq), basic solution. How many electrons appear in the balanced half-reaction? 8 02 O 10 06 04
Part A Identify the Bronsted-Lowry acid in the following reaction: H3PO4(aq) +H20(1) - H2PO4 (aq) + H30*(aq) View...
Part A Identify the Bronsted-Lowry acid in the following reaction: H3PO4(aq) +H20(1) - H2PO4 (aq) + H30*(aq) View Available Hint(s) H2PO4 (aq) H2O(1) H30*(aq) H3PO4(aq) Submit rovide Feedback O Type here to search
Part A Identify the Bronsted-Lowry acid in the following reaction: H3PO4(aq) +H20(1) - H2PO4 (aq) + H30*(aq) View Available Hint(s) H2PO4 (aq) H2O(1) H30*(aq) H3PO4(aq) Submit rovide Feedback O Type here to search
For the reaction: NO2 -1 (aq) + Cr2O7 -2 (aq) ® Cr+3(aq) + NO3 -1 (aq)...
For the reaction: NO2 -1 (aq) + Cr2O7 -2 (aq) ® Cr+3(aq) + NO3 -1 (aq) at pH = 11.00 a. If pH = 11.00 and all other species are present in 0.47 M concentrations at 25 ?C, what is the cell potential?
Can you please try to answer these four questions for me? 3 pts Question 16 A...
Can you please try to answer these four questions for
me?
3 pts Question 16 A calibration standard has a concentration of 0.250 M. It is found to have an absorbance of 1.256. An unknown solution has an absorbance of 0.875, what is it's molarity? Question 17 In the iron thiocynate reaction a student gets the following values: [Fe3+10:0.0024M [SCN): 0.0079 M [FeSCN2+leg: 0.00055 M Given these values calculate the Kc of this reaction. Consider the react that you did...
Question 2 (1 point) Given: Cr3+ (aq) + 3e --> Cr(s); E = -0.74 V Fe2+(aq)...
Question 2 (1 point) Given: Cr3+ (aq) + 3e --> Cr(s); E = -0.74 V Fe2+(aq) + 2e- --> Fe(s): E° = -0.41 V What is the standard cell potential for the following reaction? 2Cr(s) + 3Fe2+(aq) --> 3Fe(s) + 2 Cr3+(aq)? +0.33 v -0.33 v +1.15 V O-1.15 V +0.25 V
5) Sulfuric acid reacts with nitric acid as shown to form the nitronium ion. HNO3 (aq)...
5) Sulfuric acid reacts with nitric acid as shown to form the
nitronium ion.
HNO3 (aq) + 2H2SO4 (aq) --->
NO2+ (aq) + H3O+ (aq) +
2HSO4- (aq)
Part 2 (1 point)
Identify the acid and conjugate base in the reaction. (Hint:
Draw the Lewis structures for each.)
Choose one:H2SO4/H3O+
HNO3/H3O+
HNO3/H2SO4
HNO3/HSO4-
H2SO4/NO2+
H2SO4/HSO4-
HNO3/NO2+
Part 3 (1 point)
Identify the base and conjugate acid in the reaction. (Hint:
Draw the Lewis structures for each.)
Choose one:HNO3/H2SO4
HNO3/HSO4-
HNO3/NO2+
H2SO4/H3O+
H2SO4/NO2+...
Question 4 1 pts Classify the following reaction: CuO (s) + H2SO4 (aq) H20 (1) +...
Question 4 1 pts Classify the following reaction: CuO (s) + H2SO4 (aq) H20 (1) + CuSO4 (aq) + O Proton transfer (acid-base) reaction O Oxidation-reduction reaction O Decomposition reaction O Precipitation reaction
Part B Using the Brønsted-Lowry concept of acids and bases, identify the Brønsted-Lowry acid and base in each of the following reactions: HSO4 (aq) + H2O(1)+H2SO4 (aq) + OH(aq) (CH3),N(g) + BC13 (8)—-(CH3)2NBC13 (3) Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help H50, (wa) 1:00 (CH), Now) Balcon) Brønsted-Lowry acid Brønsted-Lowry base Neither Using the Lewis concept of acids and bases, identify the Lewis acid and base in each of the following reactions: Co(NO3)3(s) +...
estion 10 of 65 > Consider the reaction. HF(aq) + KOH(aq) — KF(aq) + H20(1) What is the net ionic equation for the chemical reaction? HF(aq) + K+(aq) + OH(aq) — K+(aq) + F (aq) + H2O(1) O HF(aq) + K+(aq) + OH-(aq) — K+(aq) + F (aq) + H+(1) + OH-(1) O HF(aq) + OH-(aq) —> F-(aq) + H2O(1) HF(aq) + K+(aq) F (aq) + H+(1) HF(aq) + K+(aq) K+(aq) + H2O(1) - 11 of 65 > Calculate either...
2. Write chemical equations to explain the following observations: (a) When Cr(NO3)3 is dissolved in H20 the pH of the solution decreases thus becomes more acidic (Hint first consider forming the complex Cr(H20)63 and then consider what happen to this complex in water... I gave a similar example in the lectures) |(b) A precipitate of Al(OH)3 is redissolved with a basic solution containing lots of OH (6M KOH). (hint: what do you make here when Al(OH)3 combines with OH-? Check...
is thos correct?
Question 1 (1 point) Saved Given: NO3(aq) --> NH3(aq), basic solution. How many electrons appear in the balanced half-reaction? 8 02 O 10 06 04
Part A Identify the Bronsted-Lowry acid in the following reaction: H3PO4(aq) +H20(1) - H2PO4 (aq) + H30*(aq) View Available Hint(s) H2PO4 (aq) H2O(1) H30*(aq) H3PO4(aq) Submit rovide Feedback O Type here to search
Part A Identify the Bronsted-Lowry acid in the following reaction: H3PO4(aq) +H20(1) - H2PO4 (aq) + H30*(aq) View Available Hint(s) H2PO4 (aq) H2O(1) H30*(aq) H3PO4(aq) Submit rovide Feedback O Type here to search
Can you please try to answer these four questions for
me?
3 pts Question 16 A calibration standard has a concentration of 0.250 M. It is found to have an absorbance of 1.256. An unknown solution has an absorbance of 0.875, what is it's molarity? Question 17 In the iron thiocynate reaction a student gets the following values: [Fe3+10:0.0024M [SCN): 0.0079 M [FeSCN2+leg: 0.00055 M Given these values calculate the Kc of this reaction. Consider the react that you did...
Question 2 (1 point) Given: Cr3+ (aq) + 3e --> Cr(s); E = -0.74 V Fe2+(aq) + 2e- --> Fe(s): E° = -0.41 V What is the standard cell potential for the following reaction? 2Cr(s) + 3Fe2+(aq) --> 3Fe(s) + 2 Cr3+(aq)? +0.33 v -0.33 v +1.15 V O-1.15 V +0.25 V
5) Sulfuric acid reacts with nitric acid as shown to form the
nitronium ion.
HNO3 (aq) + 2H2SO4 (aq) --->
NO2+ (aq) + H3O+ (aq) +
2HSO4- (aq)
Part 2 (1 point)
Identify the acid and conjugate base in the reaction. (Hint:
Draw the Lewis structures for each.)
Choose one:H2SO4/H3O+
HNO3/H3O+
HNO3/H2SO4
HNO3/HSO4-
H2SO4/NO2+
H2SO4/HSO4-
HNO3/NO2+
Part 3 (1 point)
Identify the base and conjugate acid in the reaction. (Hint:
Draw the Lewis structures for each.)
Choose one:HNO3/H2SO4
HNO3/HSO4-
HNO3/NO2+
H2SO4/H3O+
H2SO4/NO2+...
Question 4 1 pts Classify the following reaction: CuO (s) + H2SO4 (aq) H20 (1) + CuSO4 (aq) + O Proton transfer (acid-base) reaction O Oxidation-reduction reaction O Decomposition reaction O Precipitation reaction
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