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A galvanic cell consists of a tin cathode immersed in a SnSO4 solution and a iron anode immersed in a FeSO4 solution. A salt bridge connects the two half-cells.
(a) What is a balanced equation for the cell reaction.
(b) A current of 1.15 A is observed to flow for a period of 1.53 hours. How much charge passes through the circuit during this time? How many moles of electrons is this charge equivalent to?
Cmol
(c) Calculate the change in mass of the tin electrode. g is _______
lost
gained
(d) Calculate the change in mass of the iron electrode. g is _______
Phthalocyanine is a large molecule used in printing inks and dyes for clothing due to its insolubility in most solvents, its chemical stability, and its intense blue color.
The rate law of a given reaction is rate=k[reactant]^2, with k=2.64 x 10^-4 M-1min-1. If the initial concentration is 0.0250 M, what is the initial rate?
1. what mass of naohsnbspmust be added to 300 ml of hcl 0.25 m in order to completely neutralize this acid?2. during a
A student placed 18.0 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mark on the neck of the flask was reached.
Study Boyle's experiment, some nitrogen gas at 1 atmosphere pressure is intent in the left hand side of a J tube. When the column of mercury is extended by adding more to the right hand side, Define the original volume of the enclosed gas (100 mL)..
In a cup calorimeter experiment, a student found that 10.9 kJ of energy was consumed by the vaporization of a 56.0 g sample of N2. Use the student's experimental data to calculate a value for ΔHvap for N2.
A certain substance, intially present at 0.500 M, decomposes by second-order kinetics with a rate constant of 4.00 x 10-1 L/mol min. Calculate the time (in minutes) required for the system to reach a concentration of 0.370 M.
The ability to sense odor is not the only chemoreceptor response in the human body.
Calculate the acid dissociation constant Ka, for the ammonium ion (NH^4+); Kb for NH3 is 1.8 x 10^-5
We have a refrigeration unit that works at a pressure of 0.1MPa in the evaporator and 1 MPa in the condenser. The refrigeration unit uses a compressor with an efficiency of 90% and a turbine with 100% efficiency is used to expand the refrigerant a..
Problem- Determine the amount of acid or base required to adjust the pH of a water sample from 11 to 8.5, given that the initial alkalinity is 80 mg/L as CaCO3.
Explain when a 1.150 g sample of iron ore is treated with 50.0 ml of HCL the iron dissolves in the acid to form a solution of FeCl3. The FeCl3 solution is diluted to 100.0 ml as well as the concentration of Fe3+ ions is determined by spectrometry ..
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