Physical Chemistry Answers

Estimate VR, HR, and SR for one of the following by suitable generalized correlations:

Estimate VR, HR, and SR for one of the following by suitable generalized correlations:

Sulfur dioxide at 450 K and 35 bar

Determine the total hardness of a water sample. Given

Volume of EDTA consumed for 20ml of standard hard water (V1) = 17.3 ml

Volume of EDTA consumed for 20ml of the sample hard water (V2) = 15.8 ml

There are two containers in the laboratory. One contains a solution 0.15 M in Fe3+ and 0.45 M in Fe2+, and the other contains a solution that is 0.27 M in I- and 0.05 M in I2. A piece of Platinum is immersed in each container, (a) Calculate the potential of each electrode relative to ENH at 25 °C. (b) Predict the chemical reaction that will occur when these two electrodes are connected and a salt bridge is placed to connect the two containers. 

The following cell has a potential of +1.2272 V at 25°C: Zn(s)|ZnCl2(aq 0.0005m)||Hg2Cl2(s)|Hg(l)|Pt(s). Determine E for this cell assuming the Debye Hückel equation is satisfied.

A gas sample in a cylinder has a volume of 980 mm at a temperature of 27 Celsius if you allow the piston to move while you eat the gas to 325 K what will the volume of the gas be at 325 K

acids and bases

state whether the following species can behave as an acid, as a base or both:

i) NH+4

ii) HCIO

iii) CO-2 3

The pKa of p-chlorobenzoic acid is 3.98; that of benzoic acid is 4.19. Calculate for σ p-Cl.

The even wave functions for 1D-Harmonic oscillator is given by

𝜓𝑣 = 𝑒

−𝛼𝑥

2⁄2

(𝑐0 + 𝑐2𝑥

2 + ⋯ + 𝑐𝑣𝑥

𝑣

)

Find the normalized wave functions for 𝜓0 𝑎𝑛𝑑 𝜓2.

[Given that 𝑐𝑛+2 =

2𝛼(𝑛−𝑣)

(𝑛+1)(𝑛+2)

𝑐𝑛]

The vibrational frequency of a diatomic molecule is given by,

e e e G  h v  h v )x 

2

1

) (

2

1

( ) = ( + − +

where v is the vibrational quantum number. Show that the spacing between theadjacent levels, ΔG, is

[1 2( 1) ]

e e G = h − v + x

. Deduce the expression of

dissociation energy by considering ΔG → 0 at the vibrational level where the bond

dissociates. What is the nature of the plot of ΔG vs (v + 1)? Why the plot is non

linear for the high value of v?