Computer Forums balancing equations
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 05-08-2007, 09:45 PM #1 Fully Optimized     Join Date: Jul 2006 Posts: 3,218 balancing equations I need a thorough breakdown on how to balance equations for instance: Magnesium nitrate and sodium hydroxide are added together to create a double replacement chemical reaction. A) Write the balanced equation for this reaction. This is where I need help, because I don't know how to balance the equation lol! __________________ __________________ www.crazycomputers.org
 05-08-2007, 10:00 PM #2 Daemon Poster     Join Date: Nov 2006 Posts: 941 Re: balancing equations Mg(NO3)2 + NaOH --> MgOH + Na(NO3)2 You simply switched the anions and cations. AX + BY -> AY + BX __________________ __________________ My word is bond and bond is life and I will give my life before my word shall fail.
 05-08-2007, 10:13 PM #3 Fully Optimized     Join Date: Jul 2006 Posts: 3,218 Re: balancing equations Ya I know it double replacement, but where do you get the numbers from like, (NO3)2? Where does the two come from? __________________ www.crazycomputers.org
 05-08-2007, 10:22 PM #4 Daemon Poster     Join Date: Nov 2006 Posts: 941 Re: balancing equations You should be able to form ionic compounds. The (NO3)2 is Nitrate, and the Mg is magnesium. Edit: I guess I should make that more clear. When you form ionic compounds, the charges have to match. Mg has a plus charge of 2, while Nitrate (NO3) has a minus charge of only 1, therefore you double it so they match (thats where the two comes from). You use parentheses when multiplying polyatomic ions like Nitrate to show that all of it is being doubled, not just the last element. __________________ My word is bond and bond is life and I will give my life before my word shall fail.
 05-08-2007, 10:35 PM #5 Fully Optimized     Join Date: Jul 2006 Posts: 3,218 Re: balancing equations Oh ok, now I get it, I just needed to know about how to double it cause I knew that Mg was +2, and NO3 was -1, I just couldn't figure out how to make them equal thanks __________________ www.crazycomputers.org
 05-08-2007, 10:47 PM #6 Daemon Poster     Join Date: Nov 2006 Posts: 941 Re: balancing equations No problem. If you have anymore chemistry questions you can ask me-- I'm pretty good __________________ My word is bond and bond is life and I will give my life before my word shall fail.
 05-08-2007, 10:52 PM #7 Fully Optimized   Join Date: Dec 2005 Posts: 2,276 Re: balancing equations Man, I learned all of this last year, I can barely remember most of it, but double replacement/single replacement/synthesis was relatively easy. Biggest hassle was just remembering the charges, balancing them afterwards was pretty fun actually. __________________ | AMD 3800+ X2 Dual Core Processor | ASUS A8N-e nF4 Ultra | Hitachi Deskstar 250gb 3.0 gb/s | 1gb Corsair Value RAM 2x512 | eVGA geforce 6800GS | sound blaster live! 24-bit | NZXT Trinity Classic chassis | OCZ GameXStream OCZ700GXSSLI PSU | I was there. In the networking forum for the first time, and it was because.. of 341
05-09-2007, 03:45 PM   #8
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Join Date: Jul 2006
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Re: balancing equations

Quote:
 Originally Posted by kchi55 Man, I learned all of this last year, I can barely remember most of it, but double replacement/single replacement/synthesis was relatively easy. Biggest hassle was just remembering the charges, balancing them afterwards was pretty fun actually.
did u actually have to memorize the charges for the whole periodic table..(even transition metals)?
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05-09-2007, 03:49 PM   #9
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Re: balancing equations

Quote:
 Originally Posted by Copperhead did u actually have to memorize the charges for the whole periodic table..(even transition metals)?
Well, you rpretty much do since you use them so much, but my teacher lets us use our periodic tables for tests/quizzes. But in class today my teacher said this was how the equation was balanced:
Mg(No3)2+2NaOH -> Mg(OH)2+2NaNO3

The easiest thing in chem is the orbitals I love doing those, cause its so easy
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 05-09-2007, 04:52 PM #10 In Runtime     Join Date: Jul 2006 Posts: 454 Re: balancing equations yeah i pretty much know all the common ones, but still there's the ones you rarely use. my favorite part of chemistry was balancing, it was pretty fun. this year it was 'physical science' with chemistry/physics. then next year i'm taking biology 1st semester and chemistry 2nd semester (block schedule) __________________ __________________ AMD Athlon 64 X2 3800+ (AM2)---ASUS M2N-SLI Deluxe (Skt. AM2)---Corsair XMS - DDR2 2GB (5-5-5-15) HDD's: 80GB & 250GB---GPU: BFG Geforce 7300GS (No Gaming)