Inorganic Chemistry Answers

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.

53.8 grams of a complex, diamminebis(oxalato)cobaltate(II), were dissolved in water and its ligand field splitting energy was measured as 55.0 kJ. What is the color of the complex? Ar: Co = 59; N = 14; H = 1; C = 12; O = 16

53.8 grams of a complex, diamminebis(oxalato)cobaltate(II), were dissolved in water and its
ligand field splitting energy was measured as 55.0 kJ. What is the color of the complex?

Ag+(aq) +e---------- Ag(s) E=0.80v
Pb2+(aq) +2e------- Pb(s) E=-0.13v

What is the equilibrium constant for the likely reaction that would occur when the two half cells
are connected?

Why is poling important for ferroelectric piezoelectrics? Explain.

How does the size of the A-site cation influence the ferroelectric properties of a perovskite type material?

Explain and compare the shapes of the polarisation vs. electric field curves of a dielectric and a ferroelectric material.

How is the perovskite structure type related to the rock salt structure type?

Why does a ferroelectric material require the absence of an inversion centre in its crystal structure?

8. When nitrogen gas reacts with hydrogen gas, ammonia gas is formed. If 0.95 g of hydrogen gas react with 4.75 g of nitrogen gas, which reactant will be the limiting reactant?
1 point
a. nitrogen gas
b. hydrogen gas
c. ammonia gas
d. Neither will be the limiting reactant.
e. The excess reactant must be determined experimentally.