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Chemistry
A Level

Why does Benzene require a catalyst to react with Bromine whereas Phenol does not?

The -OH is an activating group, it donates its lone pair into the delocalised ring of electrons. This increases the electron density in the ring, making it more reactive.

Answered by Frankie L. • Chemistry tutor
1767 Views

Calculate the pH of 0.1M Benzoic Acid (C6H5COOH). Ka = 6.3x10-5 M

Ka = [H+][B-]/[HB]Benzoic acid dissociates to C6H6COO- and H+ - this is a 1:1 ratio so the concentrations are equal hence [H+][B-] = [H

Answered by Michael B. • Chemistry tutor
20188 Views

Explain the effect of increasing concentraion of O2 on the equilibrium position of this gas phase reaction and what you might see given that Nitrogen Oxide and Nitrogen Dioxide appear colourless and brown respectively. NO + 0.5O2 ----> NO2

Using "Le Chatelier's principle", the equilbrium will seek to oppose the change made to the reaction. In order to counter the increase in oxygen concentration, the reaction will shift to...

Answered by Amman B. • Chemistry tutor
2506 Views

Define the term 'Bronsted-Lowry acid'

A proton ( H+ ion) donor

Answered by • Chemistry tutor
1544 Views

Give the electron configuration of fluorine

1s2 2s2 2p5

Answered by Becky S. • Chemistry tutor
2183 Views

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