posted by Annonomous .
Need help on how to balance equations. Here are a few of the problems.
First let me supply the w/s directions:
Predict the products of the reactions below. Then, write the balanced equation and clasify the reactions.
Here are examples of a few of the different kinds of equations I have to balance:
1. sodium + hydrogen
2. sulfuric acid + sodium hydroxide
3. hydrogen peroxide
4. zinc + hydrochloric acid
I really don't understand how any of this is done, so, an explaination of where any numbers or such comes from would be ideal.
In order to avoid memorizing thousands of equations, one tries to categorize equations into groups or types. You have several types here. I won't balance all of them or give products but I think I can get you started.
First look at the activity series in your text or on the internet. Here is a good one on the net.
Look where Na is on the series. Very high. That means high reactivity.
Na + H2 ==> NaH but I don't know if this reaction will go at room temperature or not.
H2SO4 + NaOH ==> acid + base gives a salt + water. A good type to remember.
H2O2 ==> a decomposition reaction. Forms O2 and H2O.
Zn + HCl ==> If the metal is ABOVE H in the activity series, then H2 gas + the salt is produced. If the metal is BELOW H in the activity series, there is no reaction. Another good type to remember.