(a) Use the following reaction scheme to answer Questions;(i) – (iii) below;
(i) Give one suitable procedure for carrying out each of reactions 1, 2, and 3 separately in the laboratory
(ii) State the gases produced along with lead (lI) Oxide in reaction 1.
(iii) What is the colour of lead (II) tetraoxosulphate (VI)?
(b) When a drop of concentrated trioxonitrate (V) acid was added to potassium iodide solution, a violet-colored gas was evolved?
(i) What is the name of the gas evolved?
(ii) State the functions of concentrated trioxonitrate (V) acid in the reaction.
(iii) What would be observed if starch solution were added to the reaction mixture?
Explanation
(a)(i) Reaction 1. Heat strongly or decompose thermally.
Reaction 2. Add dilute trioxonitrate (V) acid and warm.
Reaction 3. Add sodium tetraoxosulphate (VI), or dil. tetraoxosulphate VI acid or any soluble tetraoxosulphate (VI) acid or any soluble tetraoxoslphate (VI) ion. i.e. (Na\(_2\)SO\(_4\)/dil. H\(_2\)SO\(_4\))
(b) (i) Nitrogen (IV) oxide - NO\(_2\) and oxygen O\(_2\)
(i) lodine
(ii) Oxidizing agent
(iii) Blue black