Chemistry, Third edition

20 · LIGHT AND SPECTROSCOPY Nuclear magnetic resonance spectroscopy InNuclear magnetic resonance(NMR) the absorption of radio wa ...

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY There are three signals because there are protons in three different environments, those ...

20 · LIGHT AND SPECTROSCOPY You should now be able to work out why the resonance for the OH proton is a triplet. Notice that the ...

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 389 Integration and splitting (i) Draw the integration traces that would be obtained on ...

20 · LIGHT AND SPECTROSCOPY Human beings are composed of organic material, and therefore contain a large amount of combined hydr ...

NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 391 NMR spectra of compounds See if you can match the following formulae with their spec ...

20 · LIGHT AND SPECTROSCOPY In ‘whole body NMR imaging systems’, the patient lies inside a tube with the main magnetic field lyi ...

BEER–LAMBERT LAW ●Alternative units of !in common use are mol 1 dm–3cm–1. These units are con- venient because the concentratio ...

394 20 · LIGHT AND SPECTROSCOPY Example 20.5 An example of a Beer–Lambert plot is shown in Fig. 20.34. This shows the aborbance ...

PHOTOSYNTHESIS Photosynthesis What is photosynthesis? Photosynthesis is a complicated sequence of chemical reactions, driven by ...

20.1.Convert the following to frequencies (Hz): (i) 2  10 –7 m,(ii)500 nm, (iii)1000 cm–1. 20.2.Complete the table below (the f ...

REVISED QUESTIONS 397 (iii)The colour of paints may also be explained using the colour cheese to predict which frequencies of li ...

20.16.A compound contains C, H and O. Can you work out its identity from the following spectra? 398 20 · LIGHT AND SPECTROSCOPY ...

Nuclear and Radiochemistry Objectives Defines radioactivity Looks at the properties of nuclear radiation Gives examples of ca ...

400 21 · NUCLEAR AND RADIOCHEMISTRY Definition of radioactivity Atomic nuclei are said to be unstablewhen they spontaneously dis ...

MORE ABOUT NUCLEAR RADIATION Radionuclides and radioisotopes The term radionuclidemeans an atom which undergoes radioactive deca ...

21 · NUCLEAR AND RADIOCHEMISTRY More about nuclear radiation Alpha particles Alpha particles are doubly ionized helium atoms, i. ...

MATHEMATICS OF RADIOACTIVE DECAY Gamma radiation Gamma radiation is very short wavelength electromagnetic radiation, very simila ...

21 · NUCLEAR AND RADIOCHEMISTRY of the radionuclide have disintegrated. The factor kis related to the half-life of the decay by ...

USES OF RADIONUCLIDES ●In general, the early part of an exponential plot is straight (linear). The decay of the radionuclide of ...