Zusammenfassung der Ressource
Chemical Reactions
- Evidence
- New substances are made
- Fizzing
(effervescent)
- Colour change
- From a transparent liquid to a white liquid
- State change
- Solid to liquid
- Temperature change
- Can be from hot to cold or vice versa
- Reacting with acids
- Metals
- Often produce bubbles of hydrogen
- Put a lighted splint in a test tube of Hydrogen
- Squeeky Pop!
- Carbonates
- Carbon Dioxide always produced when reacted with an acid
- Turns Limewater cloudy
- Put a glowing splint in a test tube of CO2
- Goes Out
- Baking Powder creates bubbles of Co2 in cakes
- This makes them rise
- Only reacts when wet
- Washing Soda, Baking Powder, and many rocks all contain carbonates
- Fizzes in acids