2 Na + 2 H20 --> 2 NaOH + H2
is this the balanced equation?
and How do I find calulate the % yield of the products?
To determine whether the given equation is balanced, we need to check if the number of atoms on both sides of the equation is equal. Let's count the atoms for each element:
On the left-hand side (LHS):
- Sodium (Na): 2 atoms
- Hydrogen (H): 2 atoms
- Oxygen (O): 2 atoms (from 2 water molecules)
On the right-hand side (RHS):
- Sodium (Na): 2 atoms
- Oxygen (O): 2 atoms (from 2 sodium hydroxide molecules)
- Hydrogen (H): 2 atoms (from 2 sodium hydroxide molecules) + 1 atom (from hydrogen gas)
As we can see, the number of atoms is balanced for each element. So, the equation is indeed balanced.
Now let's move on to calculating the percent yield of the products. The percent yield is a measure of efficiency and represents the ratio of the actual yield (the amount of product obtained experimentally) to the theoretical yield (the maximum amount of product that could be obtained as calculated from the balanced equation), expressed as a percentage.
To calculate the percent yield, you will need the actual yield of the product obtained from an experiment. Let's assume you have this value. Now, follow these steps to calculate the percent yield:
1. Determine the theoretical yield: This is the maximum amount of a product that could be obtained based on the balanced equation. In this case, the balanced equation shows that 2 moles of sodium hydroxide (NaOH) are produced for every 2 moles of sodium (Na) reacted. So, the theoretical yield is calculated based on the amount of reacted sodium.
2. Convert the reacted sodium to moles: To calculate the theoretical yield in moles, you need to know how much sodium you reacted. Let's assume you have this value. Convert the mass of sodium reacted to moles by dividing by the molar mass of sodium (22.99 g/mol).
3. Calculate the theoretical yield: The molar ratio of sodium to sodium hydroxide in the balanced equation is 1:1. Therefore, the number of moles of sodium is equal to the number of moles of sodium hydroxide. Multiply the moles of sodium by the molar mass of sodium hydroxide (39.997 g/mol) to find the theoretical yield in grams.
4. Calculate the percent yield: Divide the actual yield (in grams) obtained from the experiment by the theoretical yield (in grams), then multiply by 100 to get the percentage.
Percent yield = (Actual Yield / Theoretical Yield) * 100
By following these steps and substituting the appropriate values, you can calculate the percent yield of the products.