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Chemistry

What is a disproportionation reaction?

In a disproportionation reaction, the same element is both oxidized and reduced. To check if an element is undergoing a disproportionation reaction, the oxidati...

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What is a nucleophile and what is an electrophile?

The word ‘phile’ comes from Greek and means ‘loving’. A nucleophile is therefore ‘nucleus loving’. We know that a nucleus is positively charged as it contains p...

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What are isotopes and how do they differ from each other?

sotopes are different forms of the same element. They have the same proton (and electron) numbers, but different neutron (and mass) numbers. Since the number of...

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Give and explain 2 of the anomalous properties of ice caused by hydrogen bonding (3)

Hydrogen bonding is the strongest form of intermolecular bonding. An intermolecular bond is a bond that exists between two molecules within a physical state of...

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Explain the trend in reactivity of group 2 elements with water as you go down the group.

The elements of the periodic table are arranged in columns called groups, and rows called periods. Elements in the same group have the same outer electronic con...

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A mixture of isomeric alkenes is produced when pentan-2-ol is dehydrated in the presence of hot concentrated sulfuric acid. Pent-1-ene is one of the isomers produced. Name and outline a mechanism for the reaction producing pent-1-ene.

The Dehydration/Elimination reactions of Alcohols are catalysed by Sulfuric Acid, initiated by attack of nucleophile so called Nucleophilic Elimination Reaction...

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State and explain the general trend in the first ionisation energies of the Period 2 elements Lithium to Fluorine.

The 1st ionisation energies generally increase, moving across the period 2 of the periodic table, due to the following reasons:

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Explain why the first ionisation energy of barium is less than the first ionisation energy of calcium.

Generally, the ionization energy of elements increases across the period, as nuclear charge increases and it decreases down the group. The first Ionization Ener...

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Heating 3.210g of hydrated magnesium sulfate, MgSO4.XH2O, forms 1.567g of anhydrous magnesium sulfate. Find the value of X and write the formula of the hydrated salt

In this question, law of conservation of mass is used to calculate mass of water present.            ...

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Complete the enthalpy diagram for the reaction between nitrogen and hydrogen to form ammonia. Label the activation energy with and without a catalyst, and the enthalpy change of reaction.

The reaction between nitrogen and hydrogen to form ammonia is an exothermic process in which the energy of products is lower than the energy of the reactants. A...

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