High-molecular compounds and laboratory work
Answers are for parents and teachers.
1
Write the polymerization equation of propene.
nCH₂=CH–CH₃ → (–CH₂–CH(CH₃)–)ₙ
2
Polystyrene has M = 52000 g/mol and the unit is 104 g/mol. What is n?
500
3
For polybutadiene with n = 1000, what is M (unit 54)?
54000
4
How does the phenolphthalein colour change when acetic acid reacts with NaOH?
the crimson colour disappears
5
Name two ways to reduce plastic waste.
reuse and sorting for recycling