.:`=-~rANdOm~`-=:. Game Servers
Support (Read Only) => Help => Topic started by: blαh2355 on August 25, 2012, 12:25:26 PM
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I tried looking at answers on google but they didn't help explain much on how to do it so here goes. Can you guys please help me with this? What mass of Na2CrO4 is required to precipitate all of the silver ions from 75 ml of .100 M solution of AgNO3?
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http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F (http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F)
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I tried looking at answers on google but they didn't help explain much on how to do it so here goes. Can you guys please help me with this? What mass of Na2CrO4 is required to precipitate all of the silver ions from 75 ml of .100 M solution of AgNO3?
Oh boy. Organic chem. It's been 3 months, but I'll try.
okay, so you have 75ml of .100 M AgNO3, and what to know how much of the other crap will precipitate it. First, create the equation. It is a double substitution reaction.
Na2CrO4 + AgNO3 -> NaN03 + Ag2CrO4
Balance
Na2Cr04 + 2AgNO3 -> 2NaNO3 + Ag2CrO4
Find the number of moles in 75ml of .100M solution of AgNO3
0.075L AgNO3 x (0.100M / 1L)
= 7.5x10^-3 moles of AgNO3
So according to the equation, it would require only half the amount of Na2CrO4 to react with the all the AgNO3 molecules, so therefore it would require only half the number of moles of Na2CrO4 to react with all of the AgNO3, so 7.5x10^-3 / 2 = 3.75x10^-3 mols of Na2CrO4. Find mass. Sig. Figs.
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http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F (http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F)
I tried looking at answers on google but they didn't help explain much on how to do it
Yeah that helps so much.
Oh boy. Organic chem. It's been 3 months, but I'll try.
Na2CrO4 + AgNO3 -> NaN03 + Ag2CrO4
I think you just nailed it. But when you wrote out that first equation, where'd the Ag2 come from?
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Yeah that helps so much.
Refresh
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Yeah that helps so much.
I think you just nailed it. But when you wrote out that first equation, where'd the Ag2 come from?
CrO4 has charge of -2, and Ag +1
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Thanks for the help rocket. :)
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http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F (http://lmgtfy.com/?q=What+mass+of+Na2CrO4+is+required+to+precipitate+all+of+the+silver+ions+from+75+ml+of+.100+M+solution+of+AgNO3%3F)
Way to read the OP.
And I hope to god that's not high school chemistry.
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Thanks for the help rocket. :)
No prob :P
Way to read the OP.
And I hope to god that's not high school chemistry.
IT IS
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Way to read the OP.
And I hope to god that's not high school chemistry.
AP Chem, summer assignment :L
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AP Chem, summer assignment :L
What grade is this
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AP Chem, summer assignment :L
>AP
That's the real problem breh.
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>AP
I did this in grade 11 ._.
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I did this in grade 11 ._.
As will I. I took the tree line second from the top.
(http://i47.tinypic.com/2q8oivl.jpg)
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As will I. I took the tree line second from the top.
LOL. AP classes.
I was offered AP math and AP science, but I said, "fuck thattttt, extra work for bragging rights and lower GPA is stupid"
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AP Chem, summer assignment :L
Oh, lol, AP classes.
I'd overload myself and go mentally insane within a couple weeks of an AP course.
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Oh, lol, AP classes.
I'd overload myself and go mentally insane within a couple weeks of an AP course.
AP teachers are tough shit.
I got AP Biology, AP English, and I signed up for AP American but they gave me Honors-Gifted instead. Good thing, too, my teacher is this fucking adorable 57yo nerdy fat dude who was in the IDF. My friends in AP American got ten motherfucking cockshitting essays to do this weekedn and they have to do another ten after that by Friday.
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AP teachers are tough shit.
I got AP Biology, AP English, and I signed up for AP American
Did Deacon take your spot?
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Did Deacon take your spot?
Doubt it, my school's administration is just one big, unorganized, bureaucratic clusterfuck.
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Doubt it, my school's administration is just one big, unorganized, bureaucratic clusterfuck.
Sounds like a perfect school for Deacon
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Doubt it, my school's administration is just one big, unorganized, bureaucratic clusterfuck.
>Southern Nevada school district
We're like 2nd worse in education.
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Sounds like a perfect school for Deacon
I'm not sure what you mean by this but I'm not liking how it sounds
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I'm not sure what you mean by this but I'm not liking how it sounds
As a man in AP American, you would rise up in the time of turmoil and assume leadership...
With guns.
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As a man in AP American, you would rise up in the time of turmoil and assume leadership...
With guns.
Iiiii think I forgot the class is actually called "American History", we just shorten it to "American" here.
Got a problem with guns, fag?
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>Southern Nevada school district
We're like 2nd worse in education.
No, that's sunny California.
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Taking AP Literature, APUSH (AP US History), Honors Physics, Senior Level Pre-Cal, American War and Conflict, and Honors Spanish 4
Im so fucking screwed this year
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Junior Year:
-IB Chemistry
-Theory of Knowledge
-IB Psychology
-IB Film
-IB Accelerated Math (Basically scrunch up two years worth of math into one)
-IB Englsh
-IB Japanese
-IB Biology
Then next year I get to take the same classes again except with AP Calc instead of IB math.
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Junior Year:
-IB Chemistry
-Theory of Knowledge
-IB Psychology
-IB Film
-IB Accelerated Math (Basically scrunch up two years worth of math into one)
-IB Englsh
-IB Japanese
-IB Biology
Then next year I get to take the same classes again except with AP Calc instead of IB math.
>Japanese
hnnnnnnnnnnnnk that's a good one
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I like where this thread is going lol. I have:
AP chem
English 2
Spanish 3
Pre-calc
Orchestra
2 Wellness classes (fitness/gym basically)
US History 1
I wanted to do basic computer programming but my schedule was full and I even had to take out lunch.
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>Japanese
hnnnnnnnnnnnnk that's a good one
What O.o
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-IB Accelerated Math (Basically scrunch up two years worth of math into one)
That's really bad, squishing what should be two years of curriculum into one.
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AP physics
PC repair & networking
comptuer programming quest (teacher lets me do whatever I want)
AP calculus
AP language & composition
AP US history
graphic design
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That's really bad, squishing what should be two years of curriculum into one.
It isn't if the student isn't a complete moron.
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It isn't if the student isn't a complete moron.
It's going to come back and haunt you later