Chapter 4 Flashcards
“What is a compound?”
“A pure chemical substance with two or more elements combined.”
“What is a crystal?”
A solid with a regular repeat arrangement of atoms
What is a polymer?
A molecule made of repeating small molecule combined
What is a chemical reaction?
A reaction that occurs when two or more chemical substances interact with each other and change into difrent chemical substances
What is a physical reaction?
A physical change that doesn’t change the chemical substance but only the appearance of the substance
What is the ph of pure water?
7 (neutral)
What is a reactant
The chemicals that are being mixed in a chemical reaction
What is the product of a chemical reaction?
The chemicals resulting from a chemical reaction
What is an endothermic reaction?
A chemical reaction during which heat energy is absorbed
What is an exothermic reaction?
A chemical reaction in which heat energy is released
Name some crystals in your home
Suger,salt,Dimond, and ice. are some of the polymers in my home.
Name some natural polymers
Ruber,wool,silk,wood fibers. Are some natural polymers.
Name some man-made polymers
Plastic and nylon are some man-made polymers.
What are some physical changes?
Melting,freezing,and condensation are some physical changes.
What factors can influence the rate of a reaction?
Answers will vary;could include increasing the concentration of the compounds that are being combined,heating the reaction, or using a catalyst.
