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A buffer is a solution which resists changes in pH when alkaline or acidic solution is added to it.

Buffers are created based on the equilibrium of a proton donor/ acceptor...

y=2^x
lny=xln2
y=e^(xln2)

It is often difficult to tell if a French noun is feminine or masculine. There are some tricks to knowing the difference though. Feminine nouns usually end in 'e' or 'ion' whereas for masculine nouns i...

When you are preparing for a speaking exam it is beneficial to revise the subject area beforehand. Talk to your teacher/tutor and find out which topic/s you will be discussing. You could meet up with a...

These are called object pronouns and they take a little practice. Though don't worry, object pronouns are basically just words that mean 'it' or 'him or her'.

To break it down simply:
'Lo...