ALTERNATIVE PRACTICAL  B

D contains 6.30 g of HNO\(_3\) in 500 cm\(_3\) of solution. E was prepared by dissolving 8.20 g of washing soda crystals ( Na\(_2\)CO\(_3\).xH\(_2\)O) in 250 cm\(^3\) of distilled water.

(a) Put D into the burette and titrate it against 20.0 or 25.0 cm\(^3\) portion of E using methyl orange as indicator. 

     Repeat the exercise to obtain concordance titre values.

     Tabulate your results and calculate the average volume of the acid used.

(b) Write a balanced chemical equation for the reaction.

(c) From your results and the information given;

(i) calculate the concentration of E in moldm\(^{-3}\);

(ii) what is the value of x in Na\(_2\)CO\(_3\).xH\(_2\)O? [H= 1.0; C =12.0; O = 16.0; Na = 23.0; N = 14.0 ]