EXPERIMENT : CONDUCTOMETRIC TITRATION OF A MIXTURE OF ACIDS WITH A STRONG BASE    I want Theoretical Background for this experiment

If a dispersion of particles had zero charge (as measured by their zeta potential) and no surfactant coating, what would you expect dynamic light scattering to show in terms of effective hydrodynamic particle radius? A small negative value A value of zero A small positive value A large positive value A bimodal distribution of small and large value 25

(1) For the cubit unit cell shown below, a. How many atoms are there within in the cell? b. What is the name of the lattice characterized by this unit cell? Explain your answer.

Q2:. (a) For a free electron with a velocity of lo7 cm/s, what is its de Broglie wavelength. (b) In GaAs, the effective mass of electrons in the conduction band is 0.063 mo. If they have the same velocity, find the corresponding de Broglie wavelength.