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What exactly is meant by 'balancing equations'?

Chemical reactions can be written as an equation with molecules on each side of the equation. Balancing equations is about ensuring that the number of atoms of each element on the left hand side of an equati...
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Answered by Michael F. • Chemistry tutor
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What is a method that you can use for balancing equations?

Below is 2 examples of questions that you could be asked. During the session, I will run through on the whiteboard, a good method of completing this style of question. _GaF 3 + _Na 3 PO 4 -----> _GaPO 4 +...
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Answered by Adit B. • Chemistry tutor
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A sample of CaCO3 has been weighed in at 6.3 g. How many moles of calcium carbonate are present?

The first thing to think of here is what does a mole actually mean?Using the equation: Moles = Mass (g) / Molar Mass we can first find out what the molar mass of CaCO 3 is.TO THE PERIODIC TABLE!1) List the i...
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Answered by Thomas C. • Chemistry tutor
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Calculate the pH of the buffer solution resulting from mixing 250 cm^3 of 0.3 moldm^-3 ethanoic acid with 250cm^3 of 0.2 moldm^-3 sodium hydroxide. The Ka of ethanoic acid is 1.8 x 10^-5.

As an acid is being added to a base, you first need to calculate what is left after they react. Without doing any calculations, we can already see that the acid is in excess as both solutions have the same v...
TD
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What is a mole?

A mole is a measure of quantity, such that when you have a mole of something, you have 6.02 x 10 23 atoms/molecules of it. The number of atoms/molecules in a mole is called "Avogadro's Number" and ...
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Answered by Amy F. • Chemistry tutor
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