Summary Chemical ideas

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ISBN-10 0435631497 ISBN-13 9780435631499
263 Flashcards & Notes
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This is the summary of the book "Chemical ideas". The author(s) of the book is/are central Chris Otter. The ISBN of the book is 9780435631499 or 0435631497. This summary is written by students who study efficient with the Study Tool of Study Smart With Chris.

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Give the systematic name of HCO3-

Hydrogen carbonate

Explain why many ionic substances are soluble in water, naming the bonds broken and made.

- ionic bonds broken

- ion dipole bonds formed

- hydrogen bonds in water are broken

- similar strength between bonds broken and made

Explain how the gas/liquid chromatogram could be used to determine the % composition of each component in the mixture.

- measure the area under the peak

- Find the total area

- % = (area of one peak / total area) x 100

What name is given to the process by which components in a mixture are separated during g.l.c?

Adsorption 

What is the Rf value?

The distance travelled by the substance divided by the distance traveled by the solvent.

Compare the different reactivities of benzene and alkenes towards chlorine. 

In benzene the electrons are delocalised/ spread out. In alkenes electrons are concentrated between two carbons - electrophiles are attracted more to greater electron density in alkenes.

How does a halogen carrier (e.g. AlCl3) allow the reaction between benzene and chlorine to take place?

It can form a dipole with the chlorine gas to form Cl+

Name two types of commercially important material whose manufacture involves the nitration of benzene.

- Dyes

- Explosives

Which enthalpy change in a Born-Haber cycle is the best measure of the stability of the compound concerned? 

Enthalpy change of formation

As time goes by why would a pigment not fade?

It is not affected by sunlight/oxygen/water (just need to remember one)