rachie19
  • rachie19
help balance this equation for stoivhiometry. Na2 So4 + BaCl2---->> NaCl+BaSO4
Chemistry
jamiebookeater
  • jamiebookeater
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Photon336
  • Photon336
@rachie19 let me ask you something, is this the first time you have to do this? what is confusing
rachie19
  • rachie19
i want to know if i id it right . i got BaSo4+2NaCl. and i havent actua;;y learned it yet its for a prelab.
rachie19
  • rachie19

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Photon336
  • Photon336
TO balance a chemical reaction though it takes practice, but the first thing you need to do is to identify and make a chart like this: |dw:1443632818209:dw| identify each atom type in the reactants and write them down do the same thing for the products. after you do that write the number of atoms for each type in the reactants and products. when you do that if the number of atoms of each element on the reactants and products do not equal each other your equation is not balanced could you do that and then tell me what you get?
Photon336
  • Photon336
rachie19
  • rachie19
|dw:1443632948411:dw|
Photon336
  • Photon336
nice work, now from this it's pretty straightforward afterwards you can easily tell whether this is balanced or not @rachie19
rachie19
  • rachie19
so 2NaCl 2S Ba O4
rachie19
  • rachie19
i meant 2SO4
Photon336
  • Photon336
so yeah if you do this method it's an easy way to see whether your reaction isn't balanced or not almost so yeah you're right we need to put a 2 in front of NaCl to give us 2 atoms of Na and 2 atoms of Cl but you missed one thing. |dw:1443633584339:dw| after we do this we need to look at the whole reaction
Photon336
  • Photon336
so @rachie19 you were right we need to put 2 in front of NaCl but what about SO4, what do you notice, and do we need to really balance that?
rachie19
  • rachie19
oh ok i saw my mistake. and no because they have the same amount right?
Photon336
  • Photon336
exactly
Photon336
  • Photon336
now checking your answer is easy
Photon336
  • Photon336
you can go back to the chart you made and see if all the atoms are the same amount so if you like you can copy your previous drawing and tell me what the final answer is?
rachie19
  • rachie19
i got 2NaCl2BaSo4
Photon336
  • Photon336
Is this what you got? @rachie19 \[Na_{2}SO_{4} + BaCl_{2} --> 2NaCl + BaSO_{4}\]
rachie19
  • rachie19
YES
Photon336
  • Photon336
excellent, I suggest using that method for one reason. you'll be able to easily see whether the reaction isn't balanced or not. but make sure you list al of the reactants and products in the chart.
rachie19
  • rachie19
Ok thank u so much for your help because i haven't actually learned it yet so this is a headstart.Thanks again
rachie19
  • rachie19
@photon336 can u help me find the stoichiometric ratio between BaCl2 and NaCl ? I got 2:1 but I'm not quite sure how if I did it the right way
Photon336
  • Photon336
@rachie19 Bacl2 we have 1 mole of that; while NaCl2 we have 2 moleS. The ratio of BaCl2/NACL2 would be 1:2
rachie19
  • rachie19
thank u =)
rachie19
  • rachie19
@Photon336 i need help with one more thing for this stoichiometry lab. lol and im promise im done.So i did a lab today and i have to find the theoretical yield of copper i know how to find the theoretical yield im just a little confused here is are my results for the lab Mass of Mg used: 0.301 Moles of Mg used:1.248 *10^-2 Mass of Copper produced:.118 grams Moles of Copper produced:1.85 *10^-3 Mg/copper mole ratio: 7:1 Correct equation: Mg(s)+CuSO4---> MgSO4 +Cu all I am missing is the theoretical, actual and percent yeild. I need some guidance Please =)
rachie19
  • rachie19
mass of copper produced is .118g btw

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