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Science WA3 - Coggle Diagram
Science WA3
Universal Indicator Tests
Pure Water
🧠 UI Tip: Green = Neutral Blue = Alkaline Red = Acidic
Alcohol (like ethanol)
Cleaning Solution (like ammonia)
Litmus Paper Tests
Strong Acid (like battery acid)
Red litmus → no change
Blue litmus → turns red
Strong Alkaline (like bleach or soap water)
Red litmus → turns blue
Blue litmus → no change
🧠 Litmus Tip: Blue to red = Acid
Red to blue = Alkaline
Mixing Liquids
Acid + Alkaline → Warm test tube (heat released)
Exothermic reaction
Acid + soapy water --> warm test tube
Reaction with Solids
Acid + Metal Strip
Bubbles observed
Soundless fizzing (effervescence)
Metal fully disappears
Acid + White Chalk Powder
Bubbles observed
Solid fully disappears
Gas may turn limewater milky