Physical Chemistry Answers

The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.

If the indicator is placed in a colourless buffer solution of pH = 4.55, what percent of the indicator will be present in the acid form, HIn?

Define and explain a thermodynamically reversible process?

Calculate the molar solubility of BaSO4 in water and. (Ksp = 1.1 X 10-10)

The solubility product of PbBr2 is 8.9 x 10 . Determine the molar solubility in pure
water.

What are the appropriate reasons for the deviation from the beer's law?

which of the following are the reactions in which molecules absorbing light do not themselves react but induace other molecules to react? (a) free radical reactions (b) chain reaction (c) reversible reactions (d) photosensitized reactions.

1. Calculate the hydrogen ion concentration in moles per liter for each of these solutions: (a) a solution whose pH is 5.20, and (b) a solution whose hydroxide concentration is 3.7 x 10-9 M.

discuss fluorescence with suitable examples. And explain phosphorescence with example.

How are spherical polar coordinates related to the rectangular cartesian coordinates? Illustrate
giving suitable relations. Also write the Schrodinger equation for hydrogen atom in spherical polar coordinates

What is the Diference between integral enthalpy of solution and differential enthalpy of solution (at least 3 points)