Balanced Equation
C3H8 + 5 02-->3 CO2+ 4H20
Calculate the % yield of the products. How do I do this?
To calculate the percent yield of the products in a chemical reaction, you need to compare the actual amount of product obtained to the theoretical amount of product predicted by the balanced equation. Follow these steps:
Step 1: Determine the theoretical yield
First, calculate the molar mass of each compound in the balanced equation.
C3H8 (propane) molar mass = (3*12.01 g/mol) + (8*1.01 g/mol) = 44.11 g/mol
CO2 (carbon dioxide) molar mass = (1*12.01 g/mol) + (2*16.00 g/mol) = 44.01 g/mol
H2O (water) molar mass = (2*1.01 g/mol) + (16.00 g/mol) = 18.02 g/mol
Next, determine the stoichiometric ratio between C3H8 and CO2 by comparing their coefficients in the balanced equation: 3:3 (C3H8:CO2)
Since the ratio is 1:1, the theoretical yield of CO2 will be the same as the amount of C3H8 used.
Step 2: Convert the given amount to moles
If you have the mass of C3H8 used, divide it by the molar mass of C3H8 to convert it to moles.
Step 3: Calculate the actual yield
Determine the actual amount of CO2 produced in the reaction, either by measuring it experimentally or given in the problem.
Step 4: Calculate the percent yield
Divide the actual yield by the theoretical yield, then multiply by 100 to get the percent yield.
Percent yield = (actual yield / theoretical yield) * 100
Note: The percent yield cannot exceed 100%.