WAEC Chemistry Practical 2026: Key Points You Must Know About PbCO₃ (Observations & Inferences)

追加: 2026-05-17

[00:00:00][music] >> Five key things students must know about lead carbonate WAEC qualitative analysis 2026.

[00:00:07]>> [music] >> One, lead carbonate is insoluble in water. The salt does not dissolve in water. Testing is done directly on the solid. [music] Two, dilute acid produces effervescence.

[00:00:17]When dilute nitric acid or hydrochloric acid is added, bubbles are seen. [music] Indicates carbonate ion present.

[00:00:26]Three, >> [music] >> gas produced is carbon dioxide. The colorless gas evolved is carbon dioxide.

[00:00:32]WAEC expects correct gas identification.

[00:00:35]Four, lime water turns milky. [music] Carbon dioxide is passed into lime water causing milky appearance. Confirms [music] carbon dioxide gas.

[00:00:44]Five, potassium iodide gives yellow precipitate. [music] Potassium iodide produces a yellow precipitate. Confirms lead ion. [music] Thank you for watching. If you see this useful to you, please subscribe to this channel and also share this to your friends.

[00:00:58]>> [music]