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Gold/Mining/Energy : Gold Price Monitor -- Ignore unavailable to you. Want to Upgrade?

To: E. Charters who wrote (82620)	2/27/2002 1:21:46 PM
From: Richnorth	Read Replies (1) \| Respond to of 116814

Tea Tea lightens in colour when an acid is added to it, eg., citric acid from lemons or lime, or citric acid or tartaric acid from a can) and tea darkens when a base (e.g., baking soda) is added to it. ================================= Baking soda When an acid (e.g.. vinegar) is added to it, a fizzing action due to carbon dioxide (CO2) occurs. When a base is added to baking soda, no fizzing action occurs. (However, you might sometimes see just a few bubbles. This is because baking soda is a bit amphoteric). ============================================ Purple cabbage juice. (Get some by boiling chopped purple cabbge in water.) In acid, it turns green; in base, it turns red. (Check on the correct colour change with vinegar (an acid) or baking soda ( a base). I might have screwed up on the color change here.) ====================== Simplest test (but not recommended):- Acids are sour (e.g., lemon juice and vinegar) Bases are "bitter" in taste. This means that if something is not sour, it is likely non-acidic.