Thursday, January 31, 2008

How is table salt formed?



Video will be shown on 'compounds' session.

Magnesium with oxygen



Will be showing this video in 'Compounds' Lesson

Sunday, January 20, 2008

Metal-acid reaction

http://www.youtube.com/watch?v=Fb8vk4H0SGg

Even a cooler video - the copper coin disappeared (actually reacted completely) with concentrated nitric acid.

Acid-metal reaction



Copper coins in concentrated nitric acid.

Boiling acid



Acidic hot spring

Universal indicator & pH scale



Use of the universal indicator in various alkaline/acidic solutions.

Acid-alkali titration



Acid-base titration. Indicator used is Phenolphthalein which turns from pink (in alkali) to colourless (in acid).

Acid-metal reaction



Hydrochloric acid + zinc give off hydrogen gas. Ignore the words in the video.

Acid-carbonate reaction: carbon dioxide test



This experiment comprises the carbon dioxide test - using limewater (calcium hydroxide).

Acid-carbonate reaction



Reaction between an acid (hydrochloric acid) and carbonate (calcium carbonate). The bubbling (effervescence) is due to the production of carbon dioxide.

Thursday, January 17, 2008

Website on Universal Indicator colour change

Click here.

Video on Litmus paper

Acid-Alkali reaction



This video is shown on first lesson on A&A.

Magic Sand



This video will be shown randomly.

Natural Indicators - Cabbage and Tea



The above video is shown during the 2nd lesson as part of the Acids and Bases series on indicators.

Msg to Ms Quek's students

Dear 103 and 106,

This blog is set up to post the videos and interesting websites which I shared with you all during lessons. Feel free to leave a comment too! :)

Cheers,
Ms Quek