Write the balanced equations for the preparation of the following compounds (as the major product) starting from iron and using only one other substance :

(a) Iron (II) chloride

(b) Iron (III) chloride

(c) Iron (II) sulphate

(d) Iron (II) sulphide

(a) A solution has a pH of 7. Explain how you would: (i) increase it's pH (ii) decrease it's pH.

(b) If a solution changes the colour of litmus from red to blue, what you can say about it's pH.

(c) What you can say about the pH of a solution, that liberates carbon dioxide from sodium carbonate?

Draw the structure of the stable positive ion formed when an acid dissolves in water.

Write balanced reactions for the following conversions (A,B,C,D)

$\text{Fe} \xrightarrow{\text{A}} \text{FeCl}$2 \xrightarrow{\text{B}} \text{FeCO}3 \xrightarrow{\text{C}} \text{Fe}(\text{NO}3)2 \xrightarrow{\text{D}} \text{Fe(OH)}_2