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Chemistry
A Level

Explain why adding small amounts of acid or base hardly changes the pH of an acidic buffer solution.

An acidic buffer solution is made up of a weak acid (e.g. ethanoic acid) and a salt containing its conjugate base (e.g. sodium ethanoate). It resists pH change via two mechanisms: The fact that the acid i...

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In terms of bonding, state the order of boiling point of propane, ethanol and ethanal and why.

The molecule with the highest boiling point is ethanol. This is because of the hydrogen bonding that occurs between molecules from the electronegative oxygen atom and electropositive hydrogen atom. The s...

SB
Answered by Sam B. Chemistry tutor
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Describe the process of oxygen transport via haemoglobin.

Haemoglobin is a complex metal ion consisting of hexa-coordinated Fe2+ ions. With 6 coordinate bonds, haemoglobin forms an octahedral shape where 4 nitrogen ligands form a haem disc, a globin m...

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What is the difference of SN1 and an SN2 mechanism?

SN1= only 1 species involved in the rate determining step = carbocation intermediate = racemic mixture = not optically active SN2= 2 species involved in the rate determining step =transition state = singl...

HS
Answered by Hannah S. Chemistry tutor
10187 Views

How to balance equations?

Balancing equations is making sure that all atoms, ions and charges have the same count on both sides of the equation. We start with checking metals, hydrogen and lastly oxygen and charges. In order to ba...

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