Inorganic Chemistry Answers

To neutralize 25 cm3 of 0,20 M KOH you need: a) 25 cm3 of 0,40 M hydrochloric acid b) 20 cm3 of 0,25 M hydrochloric acid c) 50 cm3 of 0,10 M hydrochloric acid d) 25 cm3 of 0,10 M hydrochloric acid e) none

Features of interest spider diagram and an essay writing


Draw the Phase I of Feature Interest type spider diagram (HCLO2)

Silicon can be made into either a p-type or an n-type extrinsic semiconductor

by chemical doping. These can be combined to make a photovoltaic device,

which converts photons into an electrical current. Explain how this works.

Consider the following half reactions and their standard reduction potential values to answer the following questions.


Cu2+ (aq) + e- Cu+ (aq) E° = 0.15 V

Br2 (l) + 2e- 2Br- (aq) E° = 1.08 V


i) State which reaction occurs at the anode and which at the cathode.

ii) Write the overall cell reaction.

In a certain electrolysis experiment involving Al3+ ions, 60.2 g of Al was recovered when a current of 0.352 A was used. How many minutes did the electrolysis last?

[Faraday constant = 96500 C/mol]

CaMn2O4 is of interest for use as a cathode in Ca ion batteries. Two structures can be

prepared the first is orthorhombic and is based on edge-sharing chains of MnO6

octahedra. The second is tetragonal and contains corner sharing MnO6 octahedra. The

volumes of the MnO6 octahedra are 11.82 and 8.89 Å3, respectively

a) Which of the two structures, orthorhombic or tetragonal, is likely to be stable at high

pressures?

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.

Which of these two GeO2 structures will be favored if the sample is prepared under high pressure conditions. In framing your answer, you should comment on the likely difference of Ge-O bond distances in each structure.

If excess copper reacts in a solution of silver nitrate, it is correct to state that:


A. the reaction is not considered quantitative

B. the equilibrium constant at SATP will have a numerical value between 1 and 100

C. water is not written in the equilibrium law expression because it is a spectator species

D. silver nitrate is not written in the equilibrium law expression because it is a species with a constant concentration

How many moles of Cl2 can be produced from 5.60 mol HCl in reaction

HCl + O2 → Cl2 + H2O (unbalanced) (3 significant. final answer)

Explain why all crystals contain defects at temperatures above 0 K. Draw a diagram which

shows how the free energy, enthalpy and entropy of a crystal change on the introduction

of defects into the structure.