100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Summary Edexcel A-Level Chemistry: Topic 7 - Modern Analytical Techniques I (Notes) £7.98   Add to cart
Quickly navigate to
Preview
  2.  
  3. PEARSON (PEARSON)
  4.  
  5. Chemistry 2015
  6.  
  7. Unit 7 - Modern Analytical Techniques I (9HC0)

Summary

Summary Edexcel A-Level Chemistry: Topic 7 - Modern Analytical Techniques I (Notes)
 18 views  0 purchase

Do you need a little extra help on A-Level Chemistry? This pack includes detailed notes on modern analytical techniques I, an important topic complementing the whole of organic chemistry that could appear either paper 2 or paper 3 of Edexcel A-Level Chemistry. Luckily for you, however, these notes ...

[Show more]

Preview 1 out of 2  pages

Document information

  • June 29, 2023
  • 2
  • 2022/2023
  • Summary

Subjects

Written for

All documents for this subject (7)

Seller

avatar-seller
alokbilkhu

Content preview

Modern Analytical Techniques I
Mass spectrometry
Mass spectrometry can be used to identify compounds. It is done using a mass
spectrometer and involves charging (i.e. ionising) molecules which can then be
detected due to their charge.
Here is an example of a mass spectrum:




The x- axis is
labelled as ‘m/z’ (mass to charge ratio of the ions), and the y-axis is labelled as
relative abundance. The last significant peak (i.e. 116 in this example) is known as
the molecular ion, and gives the Mr of the compound.
The smaller ion peaks are fragment ions and can indicate possible structures of the
molecules based on the groups present in that molecule.
Infrared (IR) spectroscopy
An infrared spectrum used infrared radiation and can be used to deduce which
functional groups are present in a molecule. This is due to their wavenumber
(measured in cm-1) which corresponds to the stretching absorption for certain
function groups:
 C-H for alkanes, alkenes and aldehydes
 C=C for alkenes
 O-H for alcohols
 C=O for aldehydes and ketones
 C=O and a broad O-H for carboxylic acids
 N-H for amines
 Data for wavenumber above 1500cm-1 gives information about the functional
groups present. Data below that point is in the fingerprint region.
Here is an example of an infrared spectrum:

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller alokbilkhu. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £7.98. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

76799 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£7.98
  • (0)
  Add to cart