Homework Answers
Cr in Cr2O7-2 has oxidation state of +6
Cr in Cr+3 has oxidation state of +3
So, Cr in Cr2O7-2 is reduced to Cr+3
So, Cr6+ is reduced
Cr2O7-2 is oxidising agent
S in S2O3-2 has oxidation state of +2
S in S4O6-2 has oxidation state of +2.5
So,
S2+ is oxidised.
S2O3-2 is reducing agent
1)
Answer: b
2)
Answer: b
Add Answer to:
is oxidized in the following reaction: Cr2O42- + 652032- + 14H+ + 2Cr3+ + 354062- + 7H20 Select one: O a. Cr6+ O b.52+...
Could someone please explain how to do this question? Thanks! Select the balanced equation for the...
Could someone please explain how to do this question?
Thanks!
Select the balanced equation for the reaction of K2Cr2O7 and FeSO4 in an acidic aqueous solution: o a. 2 Select one: a. Cr20-2- +6Fe2+ = 2Cr3+ + 6Fe3+ b. 14H+ + Cr2O72- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ c. 7H2+ + Cr20-2- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ d. 14H+ + 2Cr20-2- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ O e. 7H+ + Cr2O72- +...
Choose the label which best describes the following: A B C D E F G H Direction...
Choose the label which best describes the following:
A B C D E F G H Direction which anions move through the
salt bridge
A B C D E F G H Pt anode
The overall, balanced, spontaneous reaction occurring in this
(standard) cell is:
Cr2O72−(aq) + 6Cl−(aq)
+ 14H+(aq) → 7H2O(l) + 2Cr3+(aq) +
3Cl2(g)
7H2O(l) + 2Cr3+(aq) + 3Cl2(g) →
Cr2O72−(aq) + 6Cl−(aq)
+ 14H+(aq)
7H2O(l) + 2Cr3+(aq) + Cl2(g) →
Cr2O72−(aq) + 2Cl−(aq)
+ 14H+(aq)
2Cr3+(aq) + 3Cl2(g) →...
balance the following equation by the ion electron method: Balance the following equation by the ion-electron...
balance the following equation by the ion electron
method:
Balance the following equation by the ion-electron method: Cr2O3 + H2S --> Crd+ + S O A 14H+ + Cr203- + H2S --> 2Cr3+ + S + 7H20 o B 8H+ + Cr202 + H2S - - > 2Cr3+ + S + 7H20 O C 8H+ + Cr203- + 3H2S - - > 2Cr3+ + 35 + 7H20 O D 14H+ + Cr2O3 + H2S - - > Cr3+ + S...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq)...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq) + 14H+ (aq) + 6Fe2+ (aq) (a) (0.5 mark) What is the oxidation number of Cr in Cr20-2-? INSTRUCTIONS: Give your answer as a WHOLE NUMBER (i.e. 1, if positive or -1, if negative). * Tries 0/2 (b) (0.5 mark) What is the oxidizing agent in this reaction? Fe3+ Fe2+ H+ • Cr2O2- H2O O Cr3+ 13. (1 mark) Which statement is TRUE about...
Consider the following balanced cell reaction: &nb
Consider the following balanced cell reaction: Cr2O72- + 14H+ + 6I- ⟶ 2Cr3+ + 3I2+ 7H2O In the determination of the cell potential at nonstandard conditions, the value that should be used for “n” (i.e. number of electrons transferred) in the Nernst equation is: A. 2 B. 6 C. 1 D. 4 E. 5
Refer to the galvanic cell below: A.) which chemical species is oxidized as current flows if...
Refer to the galvanic cell below:
A.) which chemical species is oxidized as current flows if all
rectants/products were present at standard conditions?
B.) Which chemical species is reduced as current flows if all
rectants/products were present at standard at standard
conditions?
C.) What direction do the electrons flow?
D.) Where are the anode and cathode for this cell?
motor 0.1 M MnO4 0.2 M Mn2+ 0.01 M H 0.4 M Cr3+ 0.3 M Cr202 0.01 MH Salt Bridge The...
Consider the following half-reactions: Half-reaction E° (V) F2(g) +2e - →2F (aq) 2.870V 2H*(aq) + 2e...
Consider the following half-reactions: Half-reaction E° (V) F2(g) +2e - →2F (aq) 2.870V 2H*(aq) + 2e - H2(g) 0.000V Cr3+ (aq) + 3e — Cr(s) -0.740V (1) The strongest oxidizing agent is: enter formula (2) The weakest oxidizing agent is: (3) The weakest reducing agent is: (4) The strongest reducing agent is: (5) Will F2(g) oxidize Cr(s) to Cr3+ (aq)? (6) Which species can be oxidized by H(aq)? If none, leave box blank.
In the reaction below, which species is oxidized? 3 K S(s) + 8 H(aq) + 2NO3(aq)...
In the reaction below, which species is oxidized? 3 K S(s) + 8 H(aq) + 2NO3(aq) →6K+(aq) + 3 S(s) + 2 NO(g) + 4 H20 Select one: O a. K+ O b.NO c. NO: O d. H o e. Ks In the reaction below, which species is oxidized? 3 K S(s) + 8 H+(aq) + 2NO3- (aq) → 6 K+(aq) + 3 S(s) + 2 NO(g) + 4 H20 Select one: O a. K+ O b.NO c. NO: od....
1. Provide the oxidation number for each of the underlined elements in following compounds or ions:...
1. Provide the oxidation number for each of the underlined elements in following compounds or ions: (6) a) H3AsO3 b) d) H4P207 C202² KCIO4 N2H4 2. Which one of the following is not a oxidation-reduction reaction? (2) A) 2H2(g) + O2(g) → 2H2O(1) B) Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) C) H2O(l) + NH3(g) → NH(aq) + OH(aq) D) FeSO4(aq) + K2Cr2OH(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(1) E) Cl2(g) +2KBr(aq) + Bra(l) + 2KCl(aq)...
Classify these elements by whether they get oxidized or reduced in the reactions shown here: (Ech...
Classify these elements by whether they get oxidized or reduced in the reactions shown here: (Ech element A) 2Ca(s)+O2(g)→2CaO(s) B) F2(g) + 2Li(s) ------> 2LiF Identify the oxidizing agent and the reducing agent in each reaction below. C) 2Al(s) + 3Cl(g)-------> 2ACl3 D) 02(g)+2Mg(s)-------->2MgO(s)
Could someone please explain how to do this question?
Thanks!
Select the balanced equation for the reaction of K2Cr2O7 and FeSO4 in an acidic aqueous solution: o a. 2 Select one: a. Cr20-2- +6Fe2+ = 2Cr3+ + 6Fe3+ b. 14H+ + Cr2O72- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ c. 7H2+ + Cr20-2- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ d. 14H+ + 2Cr20-2- + 6Fe2+ → 2Cr3+ + 7H2O + 6Fe3+ O e. 7H+ + Cr2O72- +...
Choose the label which best describes the following:
A B C D E F G H Direction which anions move through the
salt bridge
A B C D E F G H Pt anode
The overall, balanced, spontaneous reaction occurring in this
(standard) cell is:
Cr2O72−(aq) + 6Cl−(aq)
+ 14H+(aq) → 7H2O(l) + 2Cr3+(aq) +
3Cl2(g)
7H2O(l) + 2Cr3+(aq) + 3Cl2(g) →
Cr2O72−(aq) + 6Cl−(aq)
+ 14H+(aq)
7H2O(l) + 2Cr3+(aq) + Cl2(g) →
Cr2O72−(aq) + 2Cl−(aq)
+ 14H+(aq)
2Cr3+(aq) + 3Cl2(g) →...
balance the following equation by the ion electron
method:
Balance the following equation by the ion-electron method: Cr2O3 + H2S --> Crd+ + S O A 14H+ + Cr203- + H2S --> 2Cr3+ + S + 7H20 o B 8H+ + Cr202 + H2S - - > 2Cr3+ + S + 7H20 O C 8H+ + Cr203- + 3H2S - - > 2Cr3+ + 35 + 7H20 O D 14H+ + Cr2O3 + H2S - - > Cr3+ + S...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq) + 14H+ (aq) + 6Fe2+ (aq) (a) (0.5 mark) What is the oxidation number of Cr in Cr20-2-? INSTRUCTIONS: Give your answer as a WHOLE NUMBER (i.e. 1, if positive or -1, if negative). * Tries 0/2 (b) (0.5 mark) What is the oxidizing agent in this reaction? Fe3+ Fe2+ H+ • Cr2O2- H2O O Cr3+ 13. (1 mark) Which statement is TRUE about...
Refer to the galvanic cell below:
A.) which chemical species is oxidized as current flows if all
rectants/products were present at standard conditions?
B.) Which chemical species is reduced as current flows if all
rectants/products were present at standard at standard
conditions?
C.) What direction do the electrons flow?
D.) Where are the anode and cathode for this cell?
motor 0.1 M MnO4 0.2 M Mn2+ 0.01 M H 0.4 M Cr3+ 0.3 M Cr202 0.01 MH Salt Bridge The...
Consider the following half-reactions: Half-reaction E° (V) F2(g) +2e - →2F (aq) 2.870V 2H*(aq) + 2e - H2(g) 0.000V Cr3+ (aq) + 3e — Cr(s) -0.740V (1) The strongest oxidizing agent is: enter formula (2) The weakest oxidizing agent is: (3) The weakest reducing agent is: (4) The strongest reducing agent is: (5) Will F2(g) oxidize Cr(s) to Cr3+ (aq)? (6) Which species can be oxidized by H(aq)? If none, leave box blank.
In the reaction below, which species is oxidized? 3 K S(s) + 8 H(aq) + 2NO3(aq) →6K+(aq) + 3 S(s) + 2 NO(g) + 4 H20 Select one: O a. K+ O b.NO c. NO: O d. H o e. Ks In the reaction below, which species is oxidized? 3 K S(s) + 8 H+(aq) + 2NO3- (aq) → 6 K+(aq) + 3 S(s) + 2 NO(g) + 4 H20 Select one: O a. K+ O b.NO c. NO: od....
1. Provide the oxidation number for each of the underlined elements in following compounds or ions: (6) a) H3AsO3 b) d) H4P207 C202² KCIO4 N2H4 2. Which one of the following is not a oxidation-reduction reaction? (2) A) 2H2(g) + O2(g) → 2H2O(1) B) Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) C) H2O(l) + NH3(g) → NH(aq) + OH(aq) D) FeSO4(aq) + K2Cr2OH(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(1) E) Cl2(g) +2KBr(aq) + Bra(l) + 2KCl(aq)...
Most questions answered within 3 hours.
-
What is meant by a “term premium”?
What can explain such a premium? Is it a...
asked 37 minutes ago -
23. Which molecule has only covalent bonds? A. CO2 B. Al2O3 C.
Mg3N2
24. The octet...
asked 1 hour ago -
the
total pressure for a mixture of N2O4 and NO2 is 2.20 atm. If Kp=
7.10...
asked 1 hour ago -
Delaware Corp. prepared a master budget that included $22,385
for direct materials, $28,600 for direct labor,...
asked 1 hour ago -
For pesticide HCB (hexachlorobenzene), its logarithmic partition
coefficient log Kow is 5.6. What would be the...
asked 1 hour ago -
A chemist requires 0.422 mil Na2CO3 for a reaction. How many
grams does this correspond to?
asked 1 hour ago -
If the vapor pressure of carvone is approximately 9.4 torr at 99
°C, approximately how much...
asked 1 hour ago -
A juice bottling company is carrying out a test at 10%
significance that the mean population...
asked 1 hour ago -
What is the reflectivity (in percent) needed to keep water at a
temperature near its freezing...
asked 1 hour ago -
Suppose that the average surface temperature of Earth is 300K.
Assume this is uniform over its...
asked 1 hour ago -
Draw the condensed structural formula for alkenes and alkynes or
the line-angle structural formula for cycloalkenes...
asked 1 hour ago -
M. Laing has suggested a new arrangement of the periodic table
(J.Chem.Ed.1989, 66,
746). Answer the following...
asked 2 hours ago