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How to choose a pH indicator for a titration?

Although it can seem a unusual question it simply requires to have understood the basis of a titration. First of all, what is a pH indicator? It is simply an acid-base compound whose acid and base form prese...
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Answered by Sarah M. • Chemistry tutor
21235 Views

How to i calculate total resistance in a circuit?

Total resistance in a circuit depends on whether the resistors are in series or parallel since this determines which equation is to be used.In series, resistors are essentially lined up next to each other so...
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Answered by Matthew K. • Physics tutor
18822 Views

What would be some handy linking words to use in my French writing - particularly essays?

When writing a French essay, it's important to not forget to follow a good, coherent structure just like you would when writing an essay in English or any other native language. Introduce your essay by refor...
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Answered by Monique S. • French tutor
4653 Views

When do I need to use 'sein' as the auxiliary verb in the past perfect tense?

Generally, we conjugate the verb 'sein' for any verb that indicates i) movement ii) or a change in state.For example i) gehen = to go and suggests an act of movement therefore we would have to conjugate the ...
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Answered by Monique S. • German tutor
8481 Views

How do i solve simultaneous equations?

simulatneous equations are solved by eliminating one of the unknowns such as x or y. there are a number of ways to do this such as substitution or subtraction/addition. For this example we will use subtracti...
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Answered by Matthew K. • Maths tutor
6057 Views