Analytical chemistry

assignment brief attached please see below for the questions, ive been in hospital so have missed some lessons so im not sure about some of this which is why im asking for help thank you

Unformatted Attachment Preview

Don't use plagiarized sources. Get Your Custom Essay on
Analytical chemistry
Just from $13/Page
Order Essay

Access to Higher Education Assignment Brief
Student Name
Diploma Title
Module title:
Unit title:
Unit Code:
Unit Status
Set Date:
Method of
Date Submitted:
Due Date:
Short Answer
Approved Late
Submission Date
Assignment Information: Assignment Title:
Task Description (including word count)
Part 1
1) Below is a mass spectrum of an alkane-(General Formula CnH2n+2).
Criteria R
a. What is the mass/charge ratio of the molecular ion and from this work out the molecular
formula of the compound?
b. Draw the 3 possible isomers of this compound.
c. During the process of mass spectrometry the molecular ion has been broken up into several
For m/z values of 29, 43 and 57, clearly identify the ions responsible and thus deduce the
possible identity of the isomer.
2) Below is the mass spectrum for methanol.
a. Draw the displayed formula of methanol.
b. The m/z peak at 32 represents the molecular ion. Write the formula of this ion.
c. Allocate fragment ions for the following peaks
Part 2
The following table shows the characteristic infrared absorptions in organic molecules. Use
this data to answer the questions below.
O- H
alcohols, esters, carboxylic
aldehydes, ketones,
carboxylic acids, esters,
organic compound with a C
H bond
carboxylic acids
N -H
amines, amides
O- H
alcohols, phenols
3200–3550 (broad)
C- O
C= O
C- H
2500–3300 (very broad)
Below are 2 different infrared spectra- one of them is for ethyl ethanoate and the other is for ethanoic
a Draw the displayed formulae of the 2 molecules.
b Identify which spectrum represents which compound
c. Identify the absorptions at A, B, C and D to back up your answer to (b).
Spectrum 1
Spectrum 2
Part 3
a) Below are 3 spectra produced using HPLC. Spectrum A contains a mixture of reference
standards, use these standards to identify the compounds present in in spectra B and C
b) Use the relative peak areas from the spectrum below to assign each peak a percentage
composition of the mixture.
Level Three criteria applied to this assignment*
1. Be able to interpret 1.1 Employ retention times/Rf values combined with
liquid and gas
peak areas to identify the identity of compounds and
their relative proportions in a mixture.
2. Be able to use
spectroscopy (IR)
spectra to identify
organic molecules.
2.1 Employ typical infrared absorption frequencies for
O–H bond C=O bond to identify alcohols, carbonyls,
carboxylic acids and esters.
3. Be able to use
mass spectrometry
(MS) to identify
unknown organic
3.1 Use a mass spectrum of an organic compound to
identify the molecular ion peak and hence to determine
molecular mass.
Tick if
3.2 Employ the formation of fragment ions as a tool for
confirming organic structures from molecular formulae.
Grade Descriptors and Indicators – to be used for GRADED Units only
Please delete the Grade Descriptors not related to the unit being assessed, and delete all if
the unit is Level 2 or Level 3 Ungraded.
Learners achieving the Graded unit at Level 3 will be graded in relation to the following
grade descriptors and components
1: Understanding of the Subject
Indicative content for Merit:
Indicative content for Distinction
The student, student’s work or performance:
The student, student’s work or performance:
demonstrates a very good grasp of the
relevant knowledge base
demonstrates an excellent grasp of the
relevant knowledge base
3: Application of skills
Indicative content for Merit:
Indicative content for Distinction
The student, student’s work or performance:
The student, student’s work or performance:
generally selects appropriate intellectual skills with very
good levels of precision
consistently selects appropriate intellectual skills with
excellent levels of precision
7. Quality
Indicative content for Merit:
Indicative content for Distinction
The student, student’s work or performance:
The student, student’s work or performance:
taken as a whole, demonstrates a very good response to
the demands of the brief/assignment
taken as a whole, demonstrates an excellent response
to the demands of the brief/assignment
Student Comment:
Student declaration: I confirm that this
assignment is my own work and that it
complies with this centre’s plagiarism

Purchase answer to see full

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages

Order your essay today and save 15% with the discount code DISCOUNT15