[Science]Balencing equations(Grade 10 Science)
i have a lab report due tommorow, and i can barley keep my eyes open, i was on a feild trip all day, the bus left at 5:30 am. ive been working on it for hours and now ive come down to the questions. i cant remember how to do them because ive missed alot of class because of sport teams. i need this mark because ibe been going down in my course and i need to kepp it above 70
%
*just imagine the big numbers as small ones and not something else. for some reason the font button wont work with Mozilla. So where you see a 2 or a 3. just imagine it as a small number. people who have done this will know what im talking about
Write the preidicted formula and balence where needed.
Here are the questions.
Synthesis
Cu+O2->(blank)
Mg+O2->(Blank)
Decomposition
CuCO3->CO2+(blank)
Single Displacement
Zn+HCl-> H2+(blank)
Zn+CuSO4->Cu+(blank)
Double Displacement
Pb(NO3)2+ KI->KNO3+(blank)
Na2CO3+HCl-> H2O+CO2+(Blank)
i know i should be doing this myself but i dont have the time. i still have shitloads to do and my friends are all out at some rec center thing 2nite.
i will owe anyone who does this a HUGE favor. thanks
Re: [Science]Balencing equations(Grade 10 Science)
lol just did this a couple of weeks ago but now in to physics
im too lazy to give u answers sorry
:blushing:
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by jaigandhi5
lol just did this a couple of weeks ago but now in to physics
im too lazy to give u answers sorry
:blushing:
PLEASSSEEEEEEEEEEEEEE
ill give u what ever u want..
gold, money, cars,women..
Re: [Science]Balencing equations(Grade 10 Science)
Oh christ, it's been years since I did chemistry. Give me a few minutes and I'll figure it out.
EDIT: Did I say years? Like 15?
The first formula is Cu2O to balance it, you would have to do:
4Cu + O2 = 2Cu2O
Second one is
MgO to balance:
2Mg + O2 = 2MgO
Working on the rest - I haven't used this part of my brain in way too long. :blink:
Re: [Science]Balencing equations(Grade 10 Science)
You could at least go through each equation and suggest what you think are the correct answers...(e.g. for the first one you could say the RHS should be Cu2O and that it's already balanced...)
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by NikkiD
Oh christ, it's been years since I did chemistry. Give me a few minutes and I'll figure it out.
thanks alot
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by TheCanuk
Decomposition
CuCO3->CO2+(blank)
CuCO3 -> CO2 + Cu2O + O2
Balanced:
4CuCO3 = 4CO2 + 2Cu2O + O2
I'm not positive on these so if I'm wrong, please someone tell me.
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by NikkiD
Oh christ, it's been years since I did chemistry. Give me a few minutes and I'll figure it out.
EDIT: Did I say years? Like 15?
The first formula is Cu2O to balance it, you would have to do:
4Cu + O2 = 2Cu2O
:blink:
:blushing:
I did this at uni not long ago :rolleyes:
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by TheCanuk
Single Displacement
Zn+HCl-> H2+(blank)
Zn+CuSO4->Cu+(blank)
Zn + HCl -> H2 + ZnCl2
Balanced:
Zn + 2HCl -> H2 + ZnCl2
Zn + CuSO4 -> Cu + ZnSO4 - it is balanced.
Re: [Science]Balencing equations(Grade 10 Science)
Quote:
Originally Posted by TheCanuk
Double Displacement
Pb(NO3)2+ KI->KNO3+(blank)
Na2CO3+HCl-> H2O+CO2+(Blank)
Pb(NO3)2 + KI -> KNO3 + PbI2
Balanced:
Pb(NO3)2 + 2KI = 2KNO3 + PbI2
Na2CO3 + HCl -> H2O + CO2 + NaCl
Balanced:
Na2CO3 + 2HCl = H2O + CO2 + 2NaCl