physical and chemical Flashcards
1
Q
what is a polymer
A
a polymer is a large molecule made up of repeating molecules, generally alkenes.
2
Q
what is a monomer
A
A monomer is a molecule which can bind with itself indefinitely to form a long chain.
3
Q
what are thermoplastics
A
a soft polymer plastic that is flexible
4
Q
what are thermosettings
A
a hard polymer plastic that is rigid
5
Q
some common polymer plastics are
A
Pva, polythylene, poly vinyl, nylon
6
Q
the word equation for neutralization between acid and base
A
acid + base = salt + water.
7
Q
do acids have more hydrogen or hydroxide ions
A
hydrogen
8
Q
do bases have more hydrogen or hydroxide ions
A
hydroxide
9
Q
chemical change
A
where a new substance is formed, hard to reverse
10
Q
physical change
A
change of state etc but no change of substance, can be reversed easily
