Boys&Girls,
Balancing a chemical equation is a very important knowledge in chemistry. What u need to do when u have to balance a chemical equation?
e.g. Al + CuO --> Al2O3 + Cu
Now the equation is not balanced.. Firstly U have to know how many Al atoms are on your left? Only 1 but you have 2 Al atoms on your right.. so u put a no 2 infront of Al...
2Al + CuO --> Al2O3 + Cu
Now u find that the number of oxygen isn't balance.. so you'll have to do something.. you can add the no 3 to CuO so that you have 3 oxygen atoms...
2Al + 3CuO --> Al2O3 + Cu
Problem now is... you have 3 Cu atoms on your left but only 1 Cu atom on your right... to make it balance, you can add the no 3 to Cu...
2Al + 3CuO --> Al2O3 + 3Cu
Now you hae a balanced equation... It is not that difficult right... try this and tell me your answer:
a) H2 + O2 --> H2O
b) Fe + Cl2 --> FeCl3
c) KMnO4 + HCl --> KCl + MnCl2 + H2O + Cl2
Good Luck :D
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a) 2H2 + 02 --> 2H2O
ReplyDeleteb) 2Fe + 3Cl2 --> 2FeCl3
c) KmnO4 + 4HCl --> KCl + MnCl2 + 4H2O + Cl2
(after that ?)
I think my answer is wrong . lols Cheers !
tq kenneth.. answers for a and b are correct... good!... for c... anyone else would like to try???
ReplyDeletezzzzzzzzz -_-"
ReplyDeletetry!!!
ReplyDeleteteacherr... x dapattt, question (c)...
ReplyDeleteteacher,,balanced equation c..difficult o...
ReplyDeleteCecelia huh? welcome in... Come on.. U guys try to balance it first before I give u the answers... TRY!!! cheers lol
ReplyDeleteKeep trying!!!!
ReplyDeleteTeacher , Tel us what is the answer for question C
ReplyDeleteokay...
ReplyDeleteanswer:
2KMnO4 + 16HCl --> 2KCl + 2MnCl2 + 8H2O + 5Cl2
since I've given u the answer... lets try another a few more....
1. C4H10 + O2 --> CO2 + H2O
2. C7H6O2 + O2 --> CO2 + H2O
3. NaOCl --> NaClO3 + NaCl
All da best!!!! ;)
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ReplyDeleteyeah thanks your love towards family life is awesome