balance chemical equations by hit and trial method ca3p2+H2O-ca(OH)2+pH3
Answers
Answer:
Ca3P2 + 6H2O → 3Ca(OH)2 + 2PH3
Explanation:
Using Trial and Error/Inspection
Example #1 (Simple)
Simple chemical equations can be balanced by inspection, that is, by trial and error. Generally, it is best to balance the most complicated molecule first. Hydrogen and oxygen are usually balanced last.
Na + O2 = Na2O
In order for this equation to be balanced, there must be an equal amount of Na on the left hand side as on the right hand side. As it stands now, there is 1 Na on the left but 2 Na's on the right. This problem is solved by putting a 2 in front of the Na on the left hand side:
2Na + O2 = Na2O
In this there are 2 Na atoms on the left and 2 Na atoms on the right. In the next step the oxygen atoms are balanced as well. On the left hand side there are 2 O atoms and the right hand side only has one. This is still an unbalanced equation. To fix this a 2 is added in front of the Na2O on the right hand side. Now the equation reads:
2Na + O2 = 2Na2O
Notice that the 2 on the right hand side is "distributed" to both the Na2 and the O. Currently the left hand side of the equation has 2 Na atoms and 2 O atoms. The right hand side has 4 Na's total and 2 O's. Again, this is a problem, there must be an equal amount of each chemical on both sides. To fix this 2 more Na's are added on the left side. The equation will now look like this:
4Na + O2 = 2Na2O
This equation is a balanced equation because there is an equal number of atoms of each element on the left and right hand sides of the equation.
Answer:
Ca3P2 + 6H2O → 3Ca(OH)2 + 2PH3
Explanation: