Top answers

Chemistry
A Level

How does aromatic electrophilic substitution work?

First, let's have a look at all the clues in the name. Aromatic - this type of reaction is characteristic for aromatic compounds because it involves the aromatic ring. It is the only type of electrophilic...

KS
Answered by Karol S. Chemistry tutor
2117 Views

Why does nuclear radius decrease and first ionisation energy increase across the period?

As we move across the period electrons occupy the same outer electron shell, having roughly the same distance to the nucleus. Moving across the period nuclear charge increases as the number of protons in ...

JM
Answered by James M. Chemistry tutor
2984 Views

What is meant by the term salt? And how would you confirm if the salt had chloride ions in?

Part 1: "A salt is is when the Hion in an acid is replaced with a cation (e.g. a metal)" 

Part 2: You would use the silver nitrate test for halide ions. You add dilute nitri...

BQ
Answered by Brendan Q. Chemistry tutor
2613 Views

Explain the trend in boiling points between HF, HCl and HBr.

There are two themes in this answer. The first being the hydrogen bonding potential of HF and the second being the difference in size of the of the halide ions. Fluorine is one of three elements that can ...

TS
Answered by Thomas S. Chemistry tutor
46837 Views

A) What assumptions are made about ideal gases. B) if 14g of an ideal gas is added to a 4 dm3 container at 210Kpa pressure and a temperature of 40oc how many moles were added and suggest the identity of the gas.

The two main assumptions that are made about ideal gases are: firstly, that the volume of the gas particles themselves is negligible or zero. So, the entire volume of the container is available. Secondly ...

ZM
Answered by Zach M. Chemistry tutor
2476 Views

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