[Pre-AP Chem] Stoichiometry

Started by xJade, Feb 24, 2017, 03:14 AM

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xJade

I have a feeling I got this question wrong.
Question:
Calculate the number of molecules of phosphoric acid produced when 600 mL of 1.35 M HCL reacts with sodium phosphate.

My work

3HCl+1Na3PO4->1H3PO4+3NaCl
600mL = .600L
1.35M = 1mol/1L


600L HCl | 1mol HCl |1mol H3PO4 | 6.02x1023 molecules
                |1L HCl      | 3mol HCl     | 1mol H3PO4

if any of ya'll can help and see if it's right or wrong xd that would be great! :heart:

 :redflower: :redflower::redflower::redflower::redflower::redflower::redflower::redflower::redflower::redflower:

:heart:You MUST learn to help yourself. Thats how you become stronger. :heart:

Vertigo2014

You never used the actual molarity given to you. If molarity is known to be moles/volume, set moles/volume = to 1.35. You are given a volume in the equation initially so you can then find the moles of HCL you're starting with. Then you can solve the equation how you did later on.

xJade


 :redflower: :redflower::redflower::redflower::redflower::redflower::redflower::redflower::redflower::redflower:

:heart:You MUST learn to help yourself. Thats how you become stronger. :heart: