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What is a redox reaction?

A redox reaction is a reaction where both reduction and oxidation are happening simultaneously. Reduction is the gain of electrons, where as oxidation is the grian of elctrons. I like to remember this using ...
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Answered by Ruth W. • Chemistry tutor
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An alcohol, X has an Mr of 74 and percentage composition of 64.9% Carbon, 13.5% Hydrogen and 21.6% Oxygen. It does not turn potassium dichromate (VI) green. Determine the structural formula of X, and state its name.

64.9/12 = 5.40833 21.6/16 = 1.35 5.40833/1.35 = 4 so 4 Carbons 13.5/1.35 = 10 so 10 Hydrogens 1.35/1.35 = 1 so 1 Oxygen 4x12+10+16 = 74 so emperical formula = Molecular formula it is a tertiary alcohol becau...
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Answered by Megan B. • Chemistry tutor
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Describe the reasons why the rates of strontium and barium with water is different

Barium reacts quicker with water than strontium as it has a lower first ionisation energy than strontium as barium has a larger atomic radius and so their is more shielding for the outer electrons. although ...
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Answered by Mohamed E. • Chemistry tutor
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Explain why the ionisation energies tend to increase across a period

As you go across a period, the next atom will have 1 more proton in its nucleus than the one before. Therefore, the nucleus of each atom will have an increasingly positive charge, meaning a stronger nuclear ...
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Answered by Megan S. • Chemistry tutor
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What factors affect ionisation energy and how does each of them affect it?

atomic radius: the larger the atomic radius, the smaller the attraction of the outer shell electrons to the nucleus so the ionisation energy is lower reduced as atomic radius increases. 2. nuclear charge: th...
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Answered by Harriet O. • Chemistry tutor
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