Chemistry Answers

Iron can be extracted from haematite, Fe2O3, using either C or CO2 as the reducing agent. The reactions are shown below.

Fe2 O3 (s) + 3 C(s) → 2 Fe(s) + 3 CO(g) ΔH = +492.7 kJ /mol Fe2 O3 (s) + 3 CO(g) → 2 Fe(s) + 3 CO2 (g) ΔH = - 24.8 kJ/mol Substance S° (J/ K·mol) Fe2 O 3 (s) 87.4 Fe (s) 27.3 C (s) 5.7 CO (g) 197.6 CO 2 (g) 213.6 Use available data given to:

1. Calculate the minimum temperature at which reduction with carbon is feasible

2. Prove by calculation that reduction with carbon monoxide is feasible at all temperatures.

4 Titration of 0.2121 g of pure Na2C2O4 required 43.31 mL of KMnO4. What is the molar concentration of the KMnO4 solution? The chemical reaction is MnO4- + C2O42- + H+ ----------> Mn2+ + CO2 + H2O (unbalanced equation) Atomic masses: Na = 23 C = 12 O = 1

1 . What is the concentration of HCl if it takes 63.0mL of 0.1 M NaOH to neutralize 140mL of the acid?

2 . If it takes 58.5mL of of 0.5 M potassium hydroxide to neutralize 135 mL of sulfuric acid, what is the concentration of the acid?

3 Describe the preparation of 2.00 L of 0.0500 M AgNO3 from the primary standard grade solid. Atomic masses: Ag = 108 N = 14 O =16

1.What is the concentration of HCl if it takes 63.0mL of 0.1 M NaOH to neutralize 140mL of the acid?

2. If it takes 58.5mL of 0.5 M potassium hydroxide to neutralize 135 mL of sulfuric acid, what is the concentration of the acid?

3. Describe the preparation of 2.00 L of 0.0500 M AgNO3 from the primary standard grade solid. Atomic masses: Ag = 108 N = 14 O =16

The molar cconcentration of a solution of ammonium molibdate in an aqueous solution which contains 48 parts per million of MoMolybdenum is?

If that a chunk of potassium weighing 7.55g is dropped into 400.0g of water at 25°C, what is the final temperature (in °C) of the water if all the heat released is used to warm the water?

if p1=4 atm and v1=3 l, what will v2 be if p2=7.3 atm?

What unit is used to describe reaction rate?

Explain in detail the Crystal Field Theory. Using

examples where applicable, how does the theory

explain the following for a transition metal complex;

1.The structure.

2.Colours behavior

3.Compound formation

4.Magnetic properties

Prepare and submit a one-page rep