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What is a buffer, and how does it respond to the addition of acid or alkali?

Firstly, I would try and establish with the tutee what a buffer is and define it. Going through the key aspects of what a buffer is. The standard definition I have for a buffer is 'A solution that minimises ...
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Answered by Tom W. • Chemistry tutor
3315 Views

When should you use the subjunctive in French?

The subjunctive should be used in French after verbs expressing: wish or desire e.g. désirer que, souhaiter que, vouloir que necessity, orders, advice, eg. falloir que, exiger que, conseiller que emotions, e...
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Answered by Emily H. • French tutor
2377 Views

What is the Rutherford scattering experiment and what did it tell us about the nature of the atom?

The experiment involves firing alpha particles, positively charged helium nuclei made of two protons and two neutrons, at a thin layer of gold foil. There is a screen behind the gold foil which is used as a ...
TD
43023 Views

How can the idea of precondtioning as part of 'Thinking Ahead' benefit a programmer when writing code?

'Thinking Ahead' is one of 5 main aspects of Computational Thinking. It is the planning of inputs, ouputs and preconditions that the program will adhear to. By 'Thinking Ahead' programmers can discover how t...
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Answered by Nathan H. • Computing tutor
10453 Views

What factors affect acidity in solution?

Approach this question in a logical manner breaking it down into constituent parts and then explaining these in turn. Give a defination for acidity i.e. pH: pH=-log10[H+] or pKa=-long10Ka The question is con...
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Answered by Theo R. • Chemistry tutor
2897 Views