2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g)
12.2 grams of Fe reacts with excess of HCl. how many grams of FeCl3 will be produced?
Here is a worked example of a stoichiometry problem.
http://www.jiskha.com/science/chemistry/stoichiometry.html
thank you!
To determine the number of grams of FeCl3 produced, you need to use stoichiometry, which is the calculation of quantities in chemical reactions. Here's how you can solve the problem step by step:
Step 1: Write down the balanced chemical equation:
2 Fe (s) + 6 HCl (aq) -> 2 FeCl3 (s) + 3 H2 (g)
Step 2: Determine the molar mass (gram formula mass) of FeCl3:
FeCl3 = (1 iron atom x atomic mass of iron) + (3 chlorine atoms x atomic mass of chlorine)
Step 3: Convert the given mass of Fe to moles:
Use the molar mass of Fe to convert grams of Fe to moles. Divide the given mass of Fe by the molar mass of Fe.
Step 4: Determine the mole-to-mole ratio between Fe and FeCl3:
Examine the balanced equation to find the mole ratio between Fe and FeCl3. In this case, the mole ratio is 2 moles of Fe : 2 moles of FeCl3.
Step 5: Convert moles of Fe to moles of FeCl3:
Multiply the moles of Fe by the mole ratio of FeCl3:Fe.
Step 6: Convert moles of FeCl3 to grams of FeCl3:
Use the molar mass of FeCl3 to convert moles of FeCl3 to grams of FeCl3. Multiply the moles of FeCl3 by the molar mass of FeCl3.
Step 7: Calculate the grams of FeCl3 produced:
Multiply the moles of FeCl3 by the molar mass of FeCl3 to obtain the grams of FeCl3 produced.
Following these steps will allow you to calculate the grams of FeCl3 produced from the given mass of Fe.