Vocab
When substances change to form new substances with different properties.
What is a chemical reaction?
This sign is observed when a reaction feels noticeably hotter or colder.
What is a change in temperature?
Spray painting a blue bat red.
What is a change in color?
Zn + Cl2 → ZnCl2
What is synthesis?
The starting materials in a chemical reaction.
What is a reactant?
The visual evidence of a gas being produced in a liquid, which is not boiling.
What is the formation of a gas (or bubbles)?
A physical change occurs when you mash potatoes, altering this property but not the substance.
What is Texture?
Mg(OH)2 → MgO + H2O
What is decomposition?
The new substances made in a chemical reaction.
What is a product?
Rusting iron and a banana ripening are examples of this observable sign.
What is a change in color?
Heating up a pan.
What is a change in temperature?
Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
What is single replacement?
A change in size, shape, or state that does not make a new substance.
What is a physical change?
Burning wood is an example of this observable sign.
What is the production of light or sound?
Cutting clay with a wire to reshape it affects this external dimension of the substance.
What is shape?
CaCl2 + Na2SO4 → CaSO4 + 2 NaCl
What is double replacement?
A solid that forms and settles out of a liquid mixture during a chemical reaction.
What is a precipitate?
The formation of a solid that settles out of a liquid mixture is called this.
What is a precipitate?
Ice melting into water.
What is a change of state?
CH4 + 2O2 → CO2 + 2H2O