Consider the reaction
2Al + 3CuSO4 = Al2(SO4)3 + 3Cu
What is the maximum amount of Cu (63.5
g/mol) that could be produced by reacting
20.0 grams of Al (27.0 g/mol) with excess
How do i do this?
Here is an example problem of stoichiometry I've posted. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html
To determine the maximum amount of copper (Cu) that could be produced in the reaction between aluminum (Al) and excess copper sulfate (CuSO4), we need to follow the following steps:
Step 1: Write and balance the equation:
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
Step 2: Convert the mass of Al to moles:
Given that the molar mass of Al is 27.0 g/mol and you have 20.0 grams of Al, we can use the formula:
moles = mass / molar mass
mole of Al = 20.0 g / 27.0 g/mol = 0.74 mol
Step 3: Use the balanced equation to determine the stoichiometric ratio between Al and Cu.
From the balanced equation, we can see that 2 moles of Al react with 3 moles of Cu to produce 3 moles of Cu.
Step 4: Determine the moles of Cu produced.
Given that the ratio of Al to Cu is 2:3, we can calculate the moles of Cu produced using the formula:
moles of Cu = moles of Al * (moles of Cu / moles of Al)
moles of Cu = 0.74 mol * (3 mol Cu / 2 mol Al) = 1.11 mol Cu
Step 5: Convert moles of Cu to grams:
Given that the molar mass of Cu is 63.5 g/mol, we can use the formula:
mass = moles * molar mass
mass of Cu = 1.11 mol * 63.5 g/mol = 70.5 grams
Therefore, the maximum amount of Cu that could be produced by reacting 20.0 grams of Al is 70.5 grams.
To find the maximum amount of Cu that could be produced in the reaction, you need to use stoichiometry and the concept of limiting reactants.
1. Start by writing the balanced equation for the reaction:
2Al + 3CuSO4 -> Al2(SO4)3 + 3Cu
2. Determine the molar masses of Al and Cu:
Molar mass of Al = 27.0 g/mol
Molar mass of Cu = 63.5 g/mol
3. Convert the given mass of Al (20.0 grams) to moles:
Moles of Al = Mass of Al / Molar mass of Al
Moles of Al = 20.0 g / 27.0 g/mol
4. Use the stoichiometric ratio from the balanced equation to determine the moles of Cu that could be produced:
Based on the balanced equation, the ratio of Al to Cu is 2:3. Therefore, moles of Cu = (Moles of Al) x (3 moles of Cu / 2 moles of Al)
5. Convert the moles of Cu to grams:
Mass of Cu = Moles of Cu x Molar mass of Cu
By following these steps, you can calculate the maximum amount of Cu that could be produced.