CHEMISTRY PRACTICAL ANSWERS: NOTE Make sure u ask your chemistry teacher to tell you the titre value to be used. Note that (cm)^3 Means raise to the power of 3 (1) volume of pippete(VB)=25c m tabulate burette readings:rough( cm)^3,1st(cm)^3 ,2nd(cm)^3 final readings:15.60, 15.40,15.20 initial readings:0.00,0 .0 average titre=(15.40+15 .20)/ 2=15.30cm^(3) (1b) cava/cavb= na/nb 0.05*15.30/ (cb*25.00)=1/2 2(0.05*15.30)=1 9cb*25.00) cb=(1.53*25.00) /25.0 cb=0.0612moldm^ -3 (1bii)molarmass of KOH=39+16=56g/ mole (1biii)relative mass of k=39g (2) tabulate (2)Test: (i)Solid C+H20 (2bi)1st portion + NaOH(aq)+ heat (2bii)2nd portion+NaoH in drops and then in excess (2c)3rd portion+Bacl2+d il Hcl (2)observation: (2a)c dissolves to form a colourless solution which turns blue litmus paper red (3a) aqueus ion(ii) tetra oxo sulphate can be converted into an aqueous solution of Magnesium tetra oxo sulphate (VI) byreacting it with magnesium metal. sin...