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Cu2+ (aq) reacts with ammonia to form the complex ion [Cu(NH)3)4]2+. Explain this reaction in terms of acid-base theory, and outline the bonding in the complex formed between Cu2+ and NH3

Ammonia acts as the Lewis base in this reaction by donating its lone pair of electrons, whilst Cu2+ (which is an electron deficient, electrophile) accepts the lone pair of electrons from the ammonia, making ...
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Answered by Sophie Z. • Chemistry tutor
85016 Views

Find the integral of 3x^2 + 4x + 9 with respect to x.

We must first remember that to integrate, we must increase the power by 1 and divide by this new power. Therefore, to integrate 3x^2 + 4x + 9, we take the first term, 3x^2 . Using the above method, we find t...
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Answered by Dylan J. • Maths tutor
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What is the subjunctive and when do I use it?

Firstly, do not worry! Even in my second year of university I'm still not 100% confident about using the subjunctive. A lot of it is simply instinctive and only becomes obvious after years of exposure to the...
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Answered by Jessica S. • French tutor
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Factorise and solve x^2 + 3x - 4 = 0

To factorise this equation, we must find two numbers that add together to make 3 and multiply to make -4 . These numbers must be -3 and -1 . We would then rewrite the equation as (x-3)(x-1)=0. To solve this ...
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Answered by Dylan J. • Maths tutor
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How would you structure a history essay introduction?

For the introduction, It really needs to be a plan of the essay you're going to write and set out a clear plan for the examiner of the paragraphs you're going to write and your point of view throughout the e...
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Answered by Helena S. • History tutor
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