TEST OF PRACTICAL KNOWLEDGE QUESTION Burette readings (initials and final) must be given to two decimal places. Volume of pipette used must also be recorded...

TEST OF PRACTICAL KNOWLEDGE QUESTION

Burette readings (initials and final) must be given to two decimal places. Volume of pipette used must also be recorded but no account experimental procedure is required. Al calculations must be done in your answer book. A solution containing 0.05moldm\(^3\) H\(_2\)SO\(_4\). B is a solution containing 1.4g per 250cm\(^3\) .XOH  

(a) Put A into the burette and titrate it against 20.0cm\(^3\) or 25.0cm\(^3\) portions of B using methyl orange indicator. Repeat the titration to obtain consistent titres. Tabulate your results and calculate the average volume of A used. The equation for the reaction involved in the titration is; H\(_2\)SO\(_{4(aq)}\) + 2XOH\(_{(aq)}\) \(\to\) X\(_2\)SO\(_{4(aq)}\) + 2H\(_2\)O\(_{(l)}\)

(b) From your results and the information provided above, calculate the;

(i) concentration of B in moldm\(^{-3}\)

(ii) molar mass XOH

(iii) relative atomic mass of X. [H = 1.00; O = 16.0 S =32.0]