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daniceko
Group Title
Help? ill give medal :)
Show your work Write a balanced net ionic equation for the following reaction. H3PO4(aq) + Ca(OH)2(aq) Ca3(PO4)2(aq) + H2O(l)
 one year ago
 one year ago
daniceko Group Title
Help? ill give medal :) Show your work Write a balanced net ionic equation for the following reaction. H3PO4(aq) + Ca(OH)2(aq) Ca3(PO4)2(aq) + H2O(l)
 one year ago
 one year ago

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daniceko Group TitleBest ResponseYou've already chosen the best response.0
@kelly226 can you help
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
I'll help :) So you want to try and have the same number of each element on each side. This is a pretty tricky one. It looks like you have twice as many P on the right as on the left side. So try adding a 2 in front of H3PO4 on the left side as a starter!
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
This is really confussing for me so now i have 2 H3PO4(aq) + Ca(OH)2(aq) Ca3(PO4)2(aq) + H2O(l)
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
If you're REALLY confused, you should start with easier questions, this one's pretty tricky. So good now try the same thing with Ca. You have 3 Ca on the right and 1 on the left.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
So would i put the 2 in front of the Ca like this? 2 H3PO4(aq) + 2Ca(OH)2(aq) Ca3(PO4)2(aq) + H2O(l) and btw there is no easier questions on the packet this is the only one like this
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
3* :) not 2 this time
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
So: 2 H3PO4(aq) + 3Ca(OH)2(aq) > Ca3(PO4)2(aq) + H2O(l) Now count your H's and O's on both sides and see if they're the same.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
I think the Os are the same but are the Hs the same
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
So do it carefully. 2H3PO4 has 2*3 = 6 H and 2*4=8 O 3Ca(OH)2 has 3*2 = 6 H and 3*2 = 6 O So the left side has 14 O and 12 H Ca3(PO4)2 has 4*2 = 8 O H2O has 2H and 1 O So the right side has 9 O and 2 H So the right side has way less Os and Hs. Can you figure out how to balance that out?
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
In order to balance it out i have to add 5 o and 10 H some how right
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
Exactly! How can you get that?
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
Hint: use H2O
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
could i add 5 to the H2O n the right end
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
Yes :) When you're adding 5 make sure you're adding 5 to 1. So the final thing should be 6H2O.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
Yay :) so now I have 2 H3PO4(aq) + 3Ca(OH)2(aq) > Ca3(PO4)2(aq) + 6H2O
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
That's the final answer! You can check it by counting everything of course. I started with P and Ca because they're only present in one of the compounds on each side, so they're easier to balance. Try to do the same when working on other problems.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
Thank You so much your a genious :) But what about earlier when they were un equal bc of 5 o and 10 H I added the 5 ut what about the 10
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
Kinda hard to understand you there :P But you added 5 H2O. So you added 5*2=10 H and 5 O. Exactly what you needed.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
Ok I understand now thank you so much for your help
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
You are very welcome
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
That's what he wrote. Except an arrow instead of the = sign. It's a reaction, not an equation.
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
wait is there (aq) in the final equation?
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
@BluFoot is there (aq) in the final equation?
 one year ago

BluFoot Group TitleBest ResponseYou've already chosen the best response.6
The states don't change when you balance the equation. So 2 H3PO4(aq) + 3Ca(OH)2(aq) > Ca3(PO4)2(aq) + 6H2O (l) is correct
 one year ago

daniceko Group TitleBest ResponseYou've already chosen the best response.0
oh ok thanks
 one year ago
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