Interaction Yellow Liquid White powder with black solids White Powder Clear Liquid White powder, no odor Clear, yellow liquid Red, gel-like liquid Clear liquid, no odor Interaction Clear liquid, smelled strong and sour Transparent Blue Yellow Liquid Liquid Light-Green liquid, no smell Light colored, hard solid Clear liquid. strong odor Clear, blue liquid Shiny Metal Blue, gehlike liquid Blue liquid, smelled like Light brown gooey solid Cloudy liquid Liquid and bubbles formed Brownish/ orangey solid with water-like substance Greenish metal Liquids remained Purple, gel-like liquid Foam and bubbles, warm to the touch soap Clear liquid, no Glowing green smell Liquid Air Softer solid, browning
Indicators of a Chemical Reaction
How can you know when a chemical reaction has occurred? A chemical reaction can result in formation of a precipitate, formation of a gas, or a change in color. The release of heat or light can also indicate a chemical reaction. These observations are called indicators of a chemical reaction. They don’t guarantee that a reaction has taken place, but if you see one of these changes when you mix chemicals, you are alerted that a reaction may have occurred. A chemical reaction is the process of breaking and forming bonds. This produces new molecules with different properties from the original ones.
The following are clues that indicate that a chemical change may have occurred:
- Unexpected color change or odor change
- Formation of a gas (bubbles form)
- Formation of a precipitate (solid forms in a liquid)
- Energy change (change in temperature, light, sound)
Don’t be fooled – A chemical reaction has not occurred when you:
- See the fizz when you open a soft drink
- Mix a yellow and blue solution to get a green solution
- Freeze or boil water
Details are provided on the data chart attached.
We examined the properties of substances before and after they interacted with each other. Analyze and interpret the data chart attached. Choose three substances below that show
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