Top answers

How do buffers work?

What is a buffer? A buffer is a solution that resists a change in pH when small amounts of acid or base are added. It is composed of either a weak acid or a weak base with its respective salt. What's going o...
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Answered by Daisy D. • Chemistry tutor
4535 Views

How can I solve a quadratic equation by factorisation?

There are many ways to solve quadratic equations including completing the square, factorisation and using the quadratic equation. Factorisation involves breaking the quadratic equation into two sets of brack...
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Answered by Tiarnan B. • Maths tutor
5257 Views

What tips would you give when revising for History exams?

As well as learning key dates, facts and issues, a really important revision tip would be to go over past paper questions where you can get access to them. The benefit of this is to enable you to think about...
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Answered by Zoe O. • History tutor
5380 Views

How I should I structure my personal statement?

The personal statement is supposed to be an academic statement, dmeonstarting your personally and interests to your prospective universities and explaining how you will be a good choice for the degree. You s...
ZO
3534 Views

Why is evil a problem?

This question refers to arguments about the existence of God. The God we normally think about in the west is supposed to have several characteristics. He is: Omnipotent (all-powerful) Omnibenevolent (all-lov...
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