I have to outline the steps of how to caluclate the moles of water of hydration?
I need to calculate the moles of water of hydration in a hydrate knowing the weight of hydrate and the weight of anhydrous salt
BaCls* 2H20 + heat =BaCl2 + 2 H20. HELP!!! Can anyone exlpain this to me in extremely simple intro chem terms….PLEASE HELP ME!!! Formulas would be helpful too
I’m assuming you are talking about the specific salt BaCl2 that you mention above. I’m assuming it’s an experiment where you’re given a sample of the hydrate, weigh it, remove the water by heating, and weigh the anhydrous salt. Based on that weight information you need to calculate the moles of water contained in the hydrate.
Here are some steps:
1. Subtract weight of anhydrous salt from weight of hydrate. This is the mass of water contained in the hydrate.
2. Calculate the total moles of water in the sample by using the formula:
moles water = (mass water in grams)/(18.0 g/mole water)
3. Calculate the moles of salt in your sample of hydrate. For BaCl2 you can look up/calculate the molecular weight as 208 g/mole BaCl2.
moles of BaCl2 = (weight of anhydrous salt in grams)/(208 g/mole BaCl2)
4. Calculate the moles of water per mole of BaCl2:
water of hydration = (moles of water calculated)/(moles of BaCl2 calculated)
(It should come out to two based on your equation in the problem statement).
I hope this helps.
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