SCIENCE .A mover has to lift a heavy box with a pulley. Which force is the greatest to overcome in order to lift the box?
1 answer:
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The monomers that react together to form polyurethane polymer are diisocyanate and diol.
<h3>What are polymers?</h3>- Polymers are a class of natural or synthetic substances
- It is made up of small units called monomers arranged in a repeated pattern to form large molecules called macromolecules
- Cellulose and resins are examples of natural polymers
- Polyethylene and polychloroprene are examples of synthetic polymers.
Polyurethane polymer is made up of monomers diisocyanate and diol. It is mostly used in home furnishing in flexible form. The structures of monomers are as follows:
Learn more about polymers:
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Explanation:
It is given that the total volume is (10 mL + 60 mL) = 70 mL.
Also, it is known that =
Where, = total volume
= initial volume
Therefore, new concentration of =
=
= 0.43 M
New concentration of NaOH =
=
= 0.14 M
So, the given reaction will be as follows.
Initial: 0.43 0.14 0
Change: -0.14 -0.14 0.14
Equilibrium: 0.29 0 0.14
As it is known that value of = 4.74
Therefore, according to Henderson-Hasselbalch equation calculate the pH as follows.
pH =
=
= 4.74 + (-0.316)
= 4.42
Therefore, we can conclude that the pH of given reaction is 4.42.