(a)Define the term solubility.

(b) The table below gives the solubility of salt Z at various mperatures

Temperature (°C)	0	10	20	30	40	50	60
Solubility (mol dm\(^{-3}\))	0.13	0.21	0.31	0.45	0.63	0.85	1.10

 

(i) Plot a graph of solubility against temperature.

(ii) From the graph determine the solubility of salt Z at 35°C.

(iii) If 100cm\(^{-3}\) of the saturated solution is cooled from 55°C to 35°C, calculate the mass of salt Z that would crystallize out. [Molar mass of salt Z = 100 g]

 

(c)(i) Write a balanced equation to illustrate the reaction of AI\(_2\)O\(_3\) with dilute I. HCI; II. NaOH.

(ii) What is the name given to an oxide that exhibits both acidic and basic properties?

(iii) Give one metallic oxide which exhibite these properties.

 

(d)(i) Determine the oxidation number of: I. Al in [Al (H\(_2\)O)\(_6\)]\(^{3+}\); II. H in NaH.

(ii) Give the IUPAC name of each of the following substances; I. CuSO\(_4\).5H\(_2\)O; II. CaCO\(_3\); Ill. KMnO\(_4\).