Pre-Laboratory Exercise: Plastics Identification I. List four properties that yo

Question

Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in ist four properties that you will use in lab to determine the identity of the polymer samples. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 2. D 3. Write the name and abbreviation for the six recyclable polymers. Given the list of wavenumber ranges in the experiment, identify the main functional groups and the identity of the IR spectra below. Identify peaks (the peaks point downward.) that are s 30% transmittance (large absorption values). Any unique peaks may also be noted. 4. Appendix 41

Explanation / Answer

There are multiple questions here . i am allowed to answer only 1 at a time. I will answer all parts 2nd question for you.Please ask other as different question.

2a)
M1 = 6 M
V1=7.17 mL
M2=?
V2=400 mL
use:
M1*V1 = M2*V2
6*7.17 = M*400
M=0.11 M

b)
NaOH + HCl --> NaCl + H2O

c)
M1= 0.116 M
V1=25 mL
M2=?
V2=23.46 mL
USE:
M1*V1=M2*V2
0.116*25 = M*23.46
M=0.12 M

d)
Answer can be dfferent due to human error only. Adding few drops more of the solution.

e)
In standard solution [NaOH] = 6 M
[OH-]= 6M

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