Question #533df
1 Answer
Explanation:
The hydrated magnesium sulfate contains water of crystallisation which is driven off when heated:
By recording the loss in mass we can find the mass of water and then convert masses into moles to find
Mass
Mass
So mass water lost =
Now we need to convert grams into moles using:
Number of moles = mass in grams/mass of 1 mole
Or:
We get this by adding all the relative atomic masses (
Using accurate
You should use the
Now using
and:
So we now know that the ratio in moles of:
We like to express this ratio in whole numbers according to how the atoms/molecules combine so we can divide both numbers by
Which is good enough (in my book) as:
So
Here is a full lab on hydrate and how to calculate the formula of a hydrate, I hope this helps more: