Search our library of Chemistry A Level questions

Top answers

Chemistry

A Level

Alcohols can be converted into alkenes by removing water. The alcohol 3-methylpent-2-ol forms a mixture of organic products when dehydrated. Describe the conditions of this reaction. Name all the organic products.

Heated under reflux with an acid catalyst such as H3PO4 or H2SO4

3-methylpent-1-ene

E-3-methylpent-2-ene

Z-3-methylpent-2-ene

Answered by Abigail B. • Chemistry tutor

2550 Views

Why is the melting temperature of Magnesium higher than that of Sodium?

More energy is required to break the metallic bonds in Magnesium, because: -Magnesium ions have a smaller ionic radius than Sodium ions so Magnesium is more closely packed -Mg2+ ions have a greater charge...

Answered by Evelyn M. • Chemistry tutor

22225 Views

Why are Amines more basic than Amides?

The lone pair of electrons on the amine are more available to accept a proton and act as a base. This is because in amides, the carbonyl (C=O) group is highly electronegative, so has a greater power to dr...

Answered by Kaylan P. • Chemistry tutor

18586 Views

Define Electronegativity

It is the TENDANCY of an atom to attract a PAIR of electrons in a COVALENT bond.

Answered by Oscar W. • Chemistry tutor

2730 Views

1. Why does the first ionisation energy of atoms generally increase across a period?

As you go across the period, the number of protons increases, however the amount of shielding stays the same, so attraction of outer electrons to nucleus increases and more energy is required to remove an...

Answered by Safia A. • Chemistry tutor

3600 Views