Physical Chemistry Answers

You have two test tubes T1 and T2.

T1 contains 2.0 mL of 0.1 N CuCl2 solution and T2 contains 2.0 mL of 0.1 N NiCl2 solution. You add dil. HCl in both the test tubes till the solutions turns acidic. Then you pass H2S gas in both the test tubes. In which of the two test tubes precipitation will occur readily? What is the principle behind the formation of precipitate?

State Raoults law

If a = 0.244 atm-L²/mole²,and b = 0.0266L/mole, find the weight of H₂ stored in a 100-cm³ cylindrical tank at 100^oC and 100 atm ( or 10, 132.5 KPa) by using (a) the ideal gas equation (b) the van der Waals equation.

** to solve for the mass of H2, use the successive approximation method

The enthalpy of fusion of anthracene is 28.8 kJ mol-1

and its melting point is 217°C. Calculate its

ideal solubility in benzene at 25°C? (Mass of anthracene is 178.23 g/mol)

The constant-pressure heat capacity of a sample of a perfect gas was found to vary with temperature

according to the expression, Cp = 20.17 + 0.3665 T. Calculate q, w, U when the temperature is

raised from 25°C to 200°C at constant pressure. (R=8.314 JK-1mol-1

)

Why is it neccessary to acidify iron solution before titration

Predict and explain the effect of the given factors on the rate of the following reaction.

K₂S₂O₈ (aq)  + 2KI (aq)                 I₂ (aq)  +  2K₂SO₄ (aq)

a.   Adding more K₂S₂O₈

b.   Holding the reaction in a 4^◦ C water bath

The NMR spectroscopy is useful for the detection of

The NMR spectroscopy is useful for the detection of

The shielded proton requiring a external magnetic field of PMR signal is said to absorb upfield