WAEC Chemistry Practical 2026

Number 3(3a)Complete the tableUnder; Apparatus(i) Measuring cylinder (or Pipette / Burette)(ii) Clay triangle(iii) Crucible(iv) Bomb calorimeterUnder; Use(i)For measuring specific volume of a liquid(ii)To support a crucible being heated by a Bunsen burner(iii)As container for melting and heating to a very high temperature(iv)To measure the heat of combustion of a particular reaction(3b)(i)PbSO⁴ (Insoluble)(ii)PbCl² (slightly soluble in cold water, soluble in hot water(iii)Pb(NO³)² (soluble)Order; PbSO⁴ <PbCl² <Pb (NO³)²(3c)(i)KNO³(aq); No effect. It is a neutral salt formed from strong acid (HNO³) and a strong base (KOH)(ii)K²CO³; turns red litmus blue. It is a basic salt formed from a weak acid (H²CO³) and strong base (KOH)(iii)Al²(SO⁴)³(aq); turns blue litmus red. It is an acidic salt; aluminium ions undergo hydrolysis in water to produce H+ ions====================