If 19.7g of ALL, is actually produced, what is the percentage yield? 2Al+3I2 2 All3
first, aluminum iodide is AlI3, not All3
more importantly, to calculate percentage yield, one needs the masses of the reactants.
To calculate the percentage yield, you need to compare the actual yield (19.7g of AlI3) to the theoretical yield. The theoretical yield is the amount of product that would be produced if the reaction went to completion, assuming all reactants were consumed.
First, you need to determine the molar masses of Al (26.98 g/mol) and I2 (253.80 g/mol) to calculate the theoretical yield.
The molar ratio between Al and AlI3 in the balanced equation is 2:2, which means 2 moles of aluminum react to form 2 moles of AlI3.
Using the molar masses and molar ratio, you can calculate the theoretical yield of AlI3:
Molar mass of AlI3 = (2 × molar mass of Al) + (3 × molar mass of I2)
Molar mass of AlI3 = (2 × 26.98 g/mol) + (3 × 253.80 g/mol)
Molar mass of AlI3 = 53.96 g/mol + 761.40 g/mol
Molar mass of AlI3 = 815.36 g/mol
Next, you can calculate the theoretical yield using the molar mass of AlI3:
Theoretical yield = (actual yield / molar mass of AlI3) × 100%
Theoretical yield = (19.7 g / 815.36 g/mol) × 100%
Theoretical yield ≈ 2.42%
Therefore, the percentage yield of AlI3 is approximately 2.42%.
To calculate the percentage yield, you need to compare the actual amount of product obtained with the theoretical amount that could be obtained if the reaction went to completion.
First, you need to determine the theoretical yield of All3 using stoichiometry. The balanced equation shows that 2 moles of Al will react with 3 moles of I2 to produce 2 moles of All3.
Next, you need to convert the given mass of Al into moles. The molar mass of Al is 26.98 g/mol (rounded to 2 decimal places), so you divide the given mass by the molar mass to get the moles of Al.
Divide the moles of Al by 2 (since the reaction ratio is 2:2 for Al and All3), and multiply this amount by 2 (to get moles of All3) to determine the theoretical yield of All3.
Now, you can calculate the percentage yield using the formula:
Percentage yield = (Actual yield / Theoretical yield) x 100
Given that the actual yield is 19.7 g, you divide this by the calculated theoretical yield (in grams) to get a decimal value. Finally, multiply by 100 to get the percentage yield.