Question 1 Marks: 1 What is the oxidation state assigned to Mn in potassium perm

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Question1 Marks: 1 What is the oxidation state assigned to Mn in potassium permanganate, KMnO4? (Recall that answers must be numbers, that is, F is -1 not 1- in HF.) Answer: Question2 Marks: 1
What is the oxidation state assigned to O in hydorgen peroxide, H2O2? Answer: Question3 Marks: 1 What is the oxidation state assigned to B in B(OH)3? Answer: Question4 Marks: 1 What is the oxidation state assigned to N in the nitrite ion, NO2-? Answer: Question5 Marks: 1
What is the oxidation state assigned to N in NH2-? Answer: Question6 Marks: 1 What is the oxidation state assigned to Cr in zinc dichromate, ZnCr2O7? Answer: Question7 Marks: 1
What is the oxidation state assigned to Xe in XeO2F2? Answer: Question8 Marks: 1 What is the oxidation state assigned to Xe in XeO3F2? Answer: Question9 Marks: 1 Easy: Complete and balance the following redox reaction in acid solution:

Cl2(g) + Br-(aq) ? Cl-(aq) + Br2(l)

For the balanced oxidation half-reaction, how many electrons are produced? How many bromide ions are there? (Always use smallest integer coefficients.) Choose at least one answer. a. 1 e- b. 2 e- c. 1 Br- d. 2 Br- Question10 Marks: 1 How many chlorine molecules are in the balanced equation? Answer: Question11 Marks: 1 Medium: Complete and balance the following redox reaction in acid solution:

Cu(s) + NO3-(aq) ? NO(g) + Cu2+(aq)

For the balanced reduction half-reaction, how many electrons are needed? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Question12 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Question13 Marks: 1 Complete and balance the following redox reaction in acid solution:

MnO4-(aq) + C2H2O4(aq) ? Mn2+(aq) + CO2(g)

For the balanced oxidation half-reaction, how many electrons are produced? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Question14 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Question15 Marks: 1 Complete and balance the following redox reaction in basic solution:

ClO-(aq) + CrO2-(aq) ? Cl-(aq) + CrO42-(aq)

For the balanced oxidation half-reaction, how many electrons are produced? How many OH- ions are there?

Hint given in the general feedback.
Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 OH- f. 2 OH- g. 3 OH- h. 4 OH- Question16 Marks: 1 How many OH- ions are in the balanced equation?

(If the OH- ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)
Question1 Marks: 1 What is the oxidation state assigned to Mn in potassium permanganate, KMnO4? (Recall that answers must be numbers, that is, F is -1 not 1- in HF.) Answer: Question1 Marks: 1 Marks: 1 What is the oxidation state assigned to Mn in potassium permanganate, KMnO4? (Recall that answers must be numbers, that is, F is -1 not 1- in HF.) Answer: What is the oxidation state assigned to Mn in potassium permanganate, KMnO4? (Recall that answers must be numbers, that is, F is -1 not 1- in HF.) Answer: Answer: Question2 Marks: 1
What is the oxidation state assigned to O in hydorgen peroxide, H2O2? Answer: Question2 Marks: 1 Marks: 1
What is the oxidation state assigned to O in hydorgen peroxide, H2O2? Answer:
What is the oxidation state assigned to O in hydorgen peroxide, H2O2? Answer: Answer: Question3 Marks: 1 What is the oxidation state assigned to B in B(OH)3? Answer: Question3 Marks: 1 Marks: 1 What is the oxidation state assigned to B in B(OH)3? Answer: What is the oxidation state assigned to B in B(OH)3? Answer: Answer: Question4 Marks: 1 What is the oxidation state assigned to N in the nitrite ion, NO2-? Answer: Question4 Marks: 1 Marks: 1 What is the oxidation state assigned to N in the nitrite ion, NO2-? Answer: What is the oxidation state assigned to N in the nitrite ion, NO2-? Answer: Answer: Question5 Marks: 1
What is the oxidation state assigned to N in NH2-? Answer: Question5 Marks: 1 Marks: 1
What is the oxidation state assigned to N in NH2-? Answer:
What is the oxidation state assigned to N in NH2-? Answer: Answer: Question6 Marks: 1 What is the oxidation state assigned to Cr in zinc dichromate, ZnCr2O7? Answer: Question6 Marks: 1 Marks: 1 What is the oxidation state assigned to Cr in zinc dichromate, ZnCr2O7? Answer: What is the oxidation state assigned to Cr in zinc dichromate, ZnCr2O7? Answer: Answer: Question7 Marks: 1
What is the oxidation state assigned to Xe in XeO2F2? Answer: Question7 Marks: 1 Marks: 1
What is the oxidation state assigned to Xe in XeO2F2? Answer:
What is the oxidation state assigned to Xe in XeO2F2? Answer: Answer: Question8 Marks: 1 What is the oxidation state assigned to Xe in XeO3F2? Answer: Question8 Marks: 1 Marks: 1 What is the oxidation state assigned to Xe in XeO3F2? Answer: What is the oxidation state assigned to Xe in XeO3F2? Answer: Answer: Question9 Marks: 1 Easy: Complete and balance the following redox reaction in acid solution:

Cl2(g) + Br-(aq) ? Cl-(aq) + Br2(l)

For the balanced oxidation half-reaction, how many electrons are produced? How many bromide ions are there? (Always use smallest integer coefficients.) Choose at least one answer. a. 1 e- b. 2 e- c. 1 Br- d. 2 Br- Question9 Marks: 1 Marks: 1 Easy: Complete and balance the following redox reaction in acid solution:

Cl2(g) + Br-(aq) ? Cl-(aq) + Br2(l)

For the balanced oxidation half-reaction, how many electrons are produced? How many bromide ions are there? (Always use smallest integer coefficients.) Choose at least one answer. a. 1 e- b. 2 e- c. 1 Br- d. 2 Br- Easy: Complete and balance the following redox reaction in acid solution:

Cl2(g) + Br-(aq) ? Cl-(aq) + Br2(l)

For the balanced oxidation half-reaction, how many electrons are produced? How many bromide ions are there? (Always use smallest integer coefficients.) Choose at least one answer. a. 1 e- b. 2 e- c. 1 Br- d. 2 Br- Choose at least one answer. Question10 Marks: 1 How many chlorine molecules are in the balanced equation? Answer: Question10 Marks: 1 Marks: 1 How many chlorine molecules are in the balanced equation? Answer: How many chlorine molecules are in the balanced equation? Answer: Answer: Question11 Marks: 1 Medium: Complete and balance the following redox reaction in acid solution:

Cu(s) + NO3-(aq) ? NO(g) + Cu2+(aq)

For the balanced reduction half-reaction, how many electrons are needed? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Question11 Marks: 1 Marks: 1 Medium: Complete and balance the following redox reaction in acid solution:

Cu(s) + NO3-(aq) ? NO(g) + Cu2+(aq)

For the balanced reduction half-reaction, how many electrons are needed? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Medium: Complete and balance the following redox reaction in acid solution:

Cu(s) + NO3-(aq) ? NO(g) + Cu2+(aq)

For the balanced reduction half-reaction, how many electrons are needed? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Choose at least one answer. Question12 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Question12 Marks: 1 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Answer: Question13 Marks: 1 Complete and balance the following redox reaction in acid solution:

MnO4-(aq) + C2H2O4(aq) ? Mn2+(aq) + CO2(g)

For the balanced oxidation half-reaction, how many electrons are produced? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Question13 Marks: 1 Marks: 1 Complete and balance the following redox reaction in acid solution:

MnO4-(aq) + C2H2O4(aq) ? Mn2+(aq) + CO2(g)

For the balanced oxidation half-reaction, how many electrons are produced? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Complete and balance the following redox reaction in acid solution:

MnO4-(aq) + C2H2O4(aq) ? Mn2+(aq) + CO2(g)

For the balanced oxidation half-reaction, how many electrons are produced? How many H+ ions are there? Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 H+ f. 2 H+ g. 3 H+ h. 4 H+ Choose at least one answer. Question14 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Question14 Marks: 1 Marks: 1 How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: How many H+ ions are in the balanced equation?

(If the H+ ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.) Answer: Answer: Question15 Marks: 1 Complete and balance the following redox reaction in basic solution:

ClO-(aq) + CrO2-(aq) ? Cl-(aq) + CrO42-(aq)

For the balanced oxidation half-reaction, how many electrons are produced? How many OH- ions are there?

Hint given in the general feedback.
Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 OH- f. 2 OH- g. 3 OH- h. 4 OH- Question15 Marks: 1 Marks: 1 Complete and balance the following redox reaction in basic solution:

ClO-(aq) + CrO2-(aq) ? Cl-(aq) + CrO42-(aq)

For the balanced oxidation half-reaction, how many electrons are produced? How many OH- ions are there?

Hint given in the general feedback.
Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 OH- f. 2 OH- g. 3 OH- h. 4 OH- Complete and balance the following redox reaction in basic solution:

ClO-(aq) + CrO2-(aq) ? Cl-(aq) + CrO42-(aq)

For the balanced oxidation half-reaction, how many electrons are produced? How many OH- ions are there?

Hint given in the general feedback.
Choose at least one answer. a. 1 e- b. 2 e- c. 3 e- d. 4 e- e. 1 OH- f. 2 OH- g. 3 OH- h. 4 OH- Choose at least one answer. Question16 Marks: 1 How many OH- ions are in the balanced equation?

(If the OH- ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)
Question16 Marks: 1 Marks: 1 How many OH- ions are in the balanced equation?

(If the OH- ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)
How many OH- ions are in the balanced equation?

(If the OH- ions are the left side (reactant), write it as a positive number. If they are the right side (product), write it as a negative number.)
a. 1 e- b. 2 e- c. 1 Br- d. 2 Br-

Explanation / Answer

1). given KMnO4

1+x-8 = 0

x = +7

Mn has the oxidation state of +7

2)Givne H2O2

we have to find the oxidation state of O

2+2x = 0

2x = -2

x = -1

Thus, the oxidation state of oxygen is -1.

3).Given the molecule B(OH)3

we have to find out the oxidation state of B

x-3 = 0 (-3 is written because the OH has the oxidation state of -1 and for 3 OH's have -3 oxidation state)

x = +3

thus, the oxidation state of B is +3

4).Given the NO2- ion. have to find out the oxidation state of N

x - 4 = -1

x = +3

Thus the oxidation state of nitrogen is +3.

5). given the NH2-. find out oxidation state of N

x + 2 = -1

x = -3

thus, the oxidation state of N is -3.

6).given the ZnCr2O7. the oxidation state of Cr is

2+2x-14 = 0

2x = 12

x = 6

the oxidation state of Cr is +6

7).Given XeO2F2. find out oxidation state of Xe.

x-4-2 = 0

x = +6

Thus, the oxidation state of Xe is +6.

8). given XeO3F2. find the oxidation state of Xe.

x-6-2 =0

x = +8. Thus the oxidation state of Xe is +8

9).Given the eq

Cl2(g) + Br-(aq) ----> Cl-(aq) + Br2(l)

The above equation can be balanced as

Cl2(g) + 2e- -----> 2Cl-(aq)

2Br-(aq) -----> Br2(l) + 2e-

The total equation can thus be written as

Cl2(g) + 2Br-(aq) -----> Br2(l) + 2Cl-(aq)

here the 2e- on the both sides cancel out..

we can say that 2e- are produced but cancel out.

in the oxidation reaction 2 electrons are produced and 2 bromide ions.

10).one molecule of chlorine is present in the above equation

11).Given the equation

Cu(s) + NO3-(aq) ? NO(g) + Cu2+(aq)

the above equation can be balanced as

(Cu ------> Cu2+ + 2e-) x 3

(NO3- + 4H+ 3e- ------> No + 2H2O) x 2

3Cu + 2NO3- +8H+ + 6e- --------> 3Cu+2 + 2NO +4H2O + 6e-

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