Inorganic Chemistry Answers

A 6.20mL sample of 0.10mol/hydrochloride acid is used to standardized sodium hydroxide. What the concentration of the sodium hydroxide?

How many grams of ammonium chloride must be added to 0.050 kg of water to produce a
solution that freezes at -5.00 °C? The cryoscopic constant of water is 1.86 °C kg mol-1
. The
molar mass of ammonium chloride is 53.5 g mol-1

Calcium hydroxide and calcium sulfate are both used to prepare a saturated solution, S. Both
solids are only sparingly soluble, and the pH of S is found to be 11.6.
(i) Given that the Ksp for calcium hydroxide is 4.0 x 10-5
and the Ksp for calcium sulfate is 2.5 x 10-5 determine the concentration of sulfate ions present in S

Given that the Ka of benzoic acid is 6.3 x10-5, calculate the pH when 0.080M sodium hydroxide is added to 10.0 ml of 0.052M benzoic acid at the equivalence point

Is the room temperature structure of BaTiO3 centrosymmetric or noncentrosymmetric? Explain.

The two acid ionization constants for oxalic acid, HOOCCOOH, are Ka1=5.6x10^-2 and Ka2=1.5x10^-4. What is the base dissociation constant, Kb, for OOCCOO2-(aq)?

Jarosite-type KFe3(SO4)2(OH)6 has a hexagonal crystal structure containing 2-D networks of corner-connected FeO6 octahedra in the a-b plane, stacked and separated from one another along the c-axis.
This compound adopts a complex long-range-ordered antiferromagnetic state below 46 K. However, a fit of the Curie-Weiss law to the linear region of the inverse magnetic susceptibility yields a Weiss temperature (θ) of -600 K. Explain the discrepancy between these two values in terms of the crystal structure and magnetic exchange interactions

The values of lattice energies (kJ/mol) for NaCl and AgCl are given below as calculated from
Born-Haber Cycle and Born-Lande equation, respectively.
U(B-H) U(B-L)
NaCl 787 751
AgCl 915 734
a) Why is the value for the lattice energy in each case, greater from Born-Haber cycle than that
from the Born-Lande equation?
b) What is the percentage difference between the two values for NaCl and AgCl? Rationalize
this on the basis of the difference in electronegativities of Na:Cl and Ag:Cl.

The common oxidation number for an alkaline earth metal is +2. Using the Born–Mayer equation and a Born–Haber cycle, show that CaCl is an exothermic compound. Use a suitable analogy to estimate an ionic radius for Ca+. The sublimation enthalpy of Ca(s) is 176 kJmol-1. Show that an explanation for the nonexistence of CaCl can be found in the enthalpy change for
the reaction 2 CaCl(s) → Ca(s) + CaCl2(s).

GeO2 exists in a number of structures, most commonly a hexagonal form that is built on corner sharing GeO4 tetrahedra and a tetragonal structure in the mineral argutite built from edge sharing GeO6 octahedra.
Giving your reasoning predict if a direct transformation between the hexagonal and tetragonal structures is likely to be first order or continuous.