Physical Chemistry Answers

A current passes through a 2.5 oh resistor of a galvanic cell for 2 hrs. The galvanic cell is made using

H2SO3 and VO2+ . A 150 grams of H2SO3 and 305 grams of VO2+ is dissolve with H2O to make the

electrolyte solution for the galvanic cell. The volume of the solutions made is 0.012m3

. Determine the

following:

a.) The reaction take place in the anode and cathode compartment. The overall redox reaction

and cell notation for VO2+ and H2SO3.

b.) Concentration of VO2

+

, VO2+ and SO4

2-

from the dissolution of H2SO3 and VO2+

c.) Standard Cell Potential, E⁰

d.) If the condition take place at a temperature of 425K, what is the

d1) Cell potential, E

d2) current that passes through 2.5ohm, I

d3) amount of electricity, Q

d4) energy, Joules

d5) Power, watts

e.) If the condition is at a Temperature of 250C, calculate

e1) Cell potential, E

e2) current that passes through 2.5ohm, I

e3) amount of electricity, Q

e4) energy, Joules

e5) Power, watts

An ideal gas undergoes a mechanically reversible process (constant pressure, constant temperature

and adiabatic process. The gas entering a T1=650K and P1=10bar decreases its temperature at constant

pressure where V2=2.91x10-3 m3

. Then, it went to isothermal process to decrease its pressure. Finally,

the gas returns to its initial state. Take Cp=𝟕

𝟐

𝑹 and Cv=𝟓

𝟐

𝑹. Calculate the following:

a. T2,P3, V1 and V3

b. Q,W,ΔU and ΔH

T1= 650k, P1= 10 bar, V2= 2.91 x10-3 find V3

A current of 2 ampere passing for 5hrs through a molten antimony salt deposits of 0.020021lbs.What is the oxidation state of the salt

calculate the pH and pOH of a mixture of 0.00189 moles of NaOH and 0.001071 moles of H₂SO₄

Calculate the amount of trypsin (MW = 23,800 g/mol) required to prepare 10 mL 0f 1.25 mg/ml trypsin in 1 mM HCl.

 ___________ is not required in determining the critical temperature of a liquid?

200 ML of a sample water required 20 ML of N/50 HCl using methyl orange indicator.

Another 200 ML of the same water sample required 8 ML of N/50 HCl using

phenolphthalein as indicator. Express the alkalinities in terms of mg of CaCO 3

3. What are the different types of pipet? Enumerate and describe each type. You

may also paste some pictures.

2. Which is more accurate in measuring volume: beaker, graduated cylinder,

pipet, or volumetric flask? Explain your answer