Inorganic Chemistry Answers

Between SO2 and SO4 2-, which one has shorter sulfur oxygen bond length since it has same bond order?

Consider the standard voltaic (or galvanic) cell: Fe,Fe2+ versus Au,Au3+. Which answer identifies the cathode and gives the Eo for the cell?

A. Fe, -0.44 V
B. Au, 1.94 V
C. Fe, 1.06 V
D. Au, 1.06 V

Question 2

What is the value of E for the half-cell?

MnO4- (0.010 M) + 8H+ (0.20 M) + 5e- Mn2+ (0.020 M) + 4H2O?

A. 1.50 V
B. 1.86 V
C. 1.44 V
D. 1.58 V

Which of the following statements is FALSE?

A. Oxidation and reduction half-reactions occur at electrodes in electrochemical cells.
B. All electrochemical reactions involve the transfer of electrons.
C. Reduction occurs at the cathode.
D. All voltaic (galvanic) cells involve the use of electricity to initiate nonspontaneous chemical reactions.

Question 8
As the cell given below operates, the strip of silver gains mass (only silver) and the concentration of silver ions in the solution around the silver strip decreases, while the strip of lead loses mass and the concentration of lead increases in the solution around the lead strip. Which of the following represents the reaction that occurs at the negative electrode in the above cell?

Pb / Pb (NO3)2 (1.0 M) || AgNO3 (1.0 M) / Ag

A. Pb2+ + 2 e- Pb
B. Pb Pb2+ + 2 e-
C. Ag+ + e- Ag
D. Ag Ag+ + e

In voltaic cells, such as those diagrammed in your text, the salt bridge _______.

A. is not necessary in order for the cell to work
B. acts as a mechanism to allow mechanical mixing of the solutions
C. allows charge balance to be maintained in the cell
D. is tightly plugged with firm agar gel through which ions cannot pass

Question 2

Which of the following is the strongest oxidizing agent?

A. Pb2+
B. I2
C. Ag+
D. Pb

In the standard notation for a voltaic cell, the double vertical line "||" represents:
A. a phase boundary
B. gas electrode
C. a wire (metal) connection
D. a salt bridge

Question 2

Which of the following statements is (are) true for all voltaic (or galvanic) cells?
(I) Reduction occurs at the cathode.
(II) The anode gains mass during discharge (note: this means operation of the cell.)
(III) The voltage is less than or equal to zero.

A. only III
B. only II
C. only I
D. II and III

What mass of zinc is required to galvanize the top of a 3.00 m × 5.50 m sheet of iron to a thickness of 0.100 mm of zinc? If the zinc comes from a solution of Zn (NO3)2 and the current is 25.5 A, how long will it take to galvanize the top of the iron? The density of zinc is 7.140 g/cm3.
A. 231 g
B. 240 g
C. 115 g
D. 225 g

Describe what happens during a neutralization reaction. Give an example.
What is an acid? How can you recognize it from its formula?
What is a base? How can you recognize it from its formula?
Describe the steps in performing a titration. What do titrant, titrate and indicator mean and what are their roles? What equipment is needed?
Find the concentration of an unknown acid if you know 1) the volume of acid 2) the concentration and volume of base needed to neutralize the acid (Sample p. 465)
Find the concentration of an unknown base if you know 1) the volume of base 2) the concentration and volume of acid needed to neutralize the base

What is a solution? Define solute and solvent and give an example.
What is the formula for finding concentration? What are the symbols and units for each quantity
Find the concentration of a solution if you know the mass of solute and volume of the solution. Give an example.
Find the number of moles of solute if you know the concentration and volume. Give an example.

Which of the following statements are wrong?
Orbital angular momentum of 1s,2s and 3s electrons are same
Mn+7 is diamagnetic
Spin magnetic moment of Fe(0) is 6.92 B.M.
Percentage uncertainty in velocity of an electron in motion is equal to percentage uncertainty in its wavelength

(2.500*10^-1) mol/L NaOH solution was used to neutralize (1.30*10^1) mL hydrochloric acid. What is the concentration of the hydrochloric acid