(a)(i) State two general methods of preparing soluble salts.

(ii) Mention three pieces of apparatus required for determining the solubility of a salt at a given temperature.

 

(b) The solubilities of two salts represented as K and L were determined at various temperatures. The results are shown in the table below:

Temperature (\(^o\)C)	0	20	40	60	80	90
Solubility of K (mol. dm\(^{-3}\))	0.38	0.46	0.54	0.62	0.69	0.73
Solubility of L (mol. dm\(^{-3}\))	0.12	0.34	0.64	1.08	1.64	2.00

 

(i) Plot the solubility curves of K and L on the same graph. Use the curves to answer questions (ii) - (iv) below.

(ii) What is the solubility of K at 50°C?

(iii) At what temperature is the solubility of L equal to 1.0mol. dm\(^{-3}\)?

(iv) Over what temperature range is K more soluble that L?

(v) Given that the molar mass of L is 101g, determine whether a solution containing 3.4g of L per 250cm\(^3\) at 20°C is saturated or unsaturated.