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10 Chemical Changes That Happen at Home
Transcript of 10 Chemical Changes That Happen at Home
Mixing an acid (vinegar)
and a base (baking soda) causes the acetic acid in the vinegar to react with the sodium bicarbonate and form carbonic acid.
A Precipitate Forms
A precipitate is a solid that forms out of solution.
For example, sometimes the pipes in our homes get clogged because precipitates of magnesium and calcium oxides have deposited themselves within the pipes. This can happen with "hard" water.
A Color Change Occurs
Leaves changing colors in the fall represent a chemical change.
Bubbles of Gas Appear
Bubbles can appear when you mix vinegar and baking soda
The Temperature Changes
When you add salt to ice, it lowers its temperature. The salt breaks the bonds
between the ice molecules and the
...So you can make homemade ice cream
Light is Emitted
Fireworks are an example of bonds forming reactions in the form of light.
The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate,
that emit characteristic colors.
Change in Volume
When baking a cake, the change in density causes the mixture to expand
A Change in Electrical Conductivity
The reaction in the anode creates electrons, and the reaction in the cathode absorbs them. The product is electricity. The battery will continue to produce electricity until one or both of the electrodes run out of the substance necessary for the reactions to occur.
A Change in Melting or Boiling Point
The addition of solutes or other substances usually changes the boiling point. Changing the pressure on a liquid changes its boiling point.
A Change in Smell or Taste
When food is left out for too long, its chemical composition changes (rots) and the smell and taste change.
A Change in any Distinctive Chemical or Physical Property
Marshmallows burning represent a distinct change chemical and physical properties.
Marshmallows will never go back to what they were before they were burnt, and the burnt part is now soot.