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Chemistry
A Level

How can amino acids act as both acids and bases?

Amino acids are amphoteric, meaning they have both acidic and basic properties. An animo acid has at least one primary amine group, NH2, and at least one carboxyl group, COOH. In an acidic environment whe...

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Answered by Zara N. Chemistry tutor
17538 Views

What is a dative covalent bond?

A dative covalent bond, or coordinate bond, is a bond where there is 1 pair of shared electrons between two atoms. The difference relative to a covalent bond is that in a dative covalent bond these electr...

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Answered by Angela N. Chemistry tutor
5138 Views

The intermolecular interactions between halogen molecules are Van der Waals' forces. Explain how these Van der Waal's forces arise between halogen molecules.

Electrons are mobile or move in halogen molecules. Therefore, there can be an uneven distribution of electrons or electron density in halogen molecules (1 mark). This creates a temporary or instantaneous ...

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Answered by Andrew L. Chemistry tutor
8720 Views

Why is a nucleophilic substitution reaction between ammonia and benzene unlikely?

A nucleophilic substitution reaction is when a nucleophile (an electron pair donor) replaces an atom or part of a molecule. In this scenario ammonia (NH3) is the nucleophile as it contains a lo...

AS
Answered by Archit S. Chemistry tutor
9108 Views

The pH of pure water can vary depending on the temperature it is held at. Does that mean pure water can be acidic or alkaline?

Interestingly, pure water will always be neutral, regardless of pH. To understand why, we have to properly look at what pH means. pH is a measure of the number of free H+ ions in a solution or liquid. The...

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