ok we did this lab that had a chemical eq.
Na2CO3 + 2HCl --> 2NaCl + HOH + CO2
i need to figure out the number of moles of NaCl produced what numbers would I use to figure this out??
2007-02-01 13:45:06 · 6 answers · asked by treesap7h 2 in Science & Mathematics ➔ Chemistry
That depends on what numbers you measured!
If you know the weight of Na2CO3 you started with, divide that by the molar mass of Na2CO3 to get the number of moles. From the equation, the number of moles of NaCL will be twice this amount.
If you know the concentration of the HCl solution and the volume you used, you can multiply them together to get the number of moles of HCl used. From the equation, this is the same as the number of moles of NaCl produced.
2007-02-01 13:51:30 · answer #1 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
the number infront of NaCl tells you how many moles would be produced.
2NaCl = 2 moles
CO2 = 1 mole because no number
2HCl = 2 moles because 2 moles
2007-02-01 13:52:40 · answer #2 · answered by orangehack 2 · 0⤊ 0⤋
I DID THIS LAB!!!!!!!!!!!!!!!!
ok, heres how you figure it out....
You need to know how many grams of Na2CO3 and/or 2HCl you start out with (whichever one you have)...
Then you use scientific notation to find out how many moles of NaCl it would equal, using the mole-to-mole ratio.
1) If you have the mass of both reactants, you do the step i mentioned above...
For example: you have 2 grams of Na2CO3 and 4 grams of 2HCl
You figure out how many moles of NaCl that would equal using scientific notation and the mole to mole ratio.
the mole-to-mole ratio for Na2CO3 and NaCl would be 1/2 and for HCl and NaCl would be 2/2.
THEN figure ouf the limiting reagant (the one which makes the least NaCl) and that would be the answer.
2) if you have the mass of only one, figure out how many moles of NaCl it would equal using scientific notation and the mole-to-mole ratio...
2007-02-01 13:56:51 · answer #3 · answered by KingZ 1 · 0⤊ 0⤋
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2016-05-16 18:27:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋
in the lab i think you're supposed to find the mass of the product (hopefully contains only NaCl).. and from there you would use n = m/MM.. n = mole, m = mass in grams, MM = molar mass (it's 58.44 g/mol for NaCl)
2007-02-01 13:49:21 · answer #5 · answered by 123haha 1 · 0⤊ 0⤋
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2016-12-16 19:04:42 · answer #6 · answered by niang 4 · 0⤊ 0⤋