how many grams of HCL is needed to produce 200 grams of hydrogen?
2HCl ==> H2--not balanced
mols H2 needed = grams/molar mass = 200/2 = 100 mols
So you will need 200 mols HCl.
g HCl = mols HCl x molar mass HCl
To determine the number of grams of HCl needed to produce 200 grams of hydrogen, you need to consider the stoichiometry of the reaction. The balanced equation for the reaction is:
2 HCl + Zn -> ZnCl2 + H2
From the equation, we can see that 2 moles of HCl are required to produce 1 mole of hydrogen. The molar mass of HCl is approximately 36.46 grams/mol.
Step 1: Convert grams of hydrogen to moles.
Number of moles of hydrogen = mass of hydrogen (in grams) / molar mass of hydrogen
Number of moles of hydrogen = 200 g / 2.02 g/mol (molar mass of hydrogen)
Step 2: Determine the number of moles of HCl needed.
Since the stoichiometry tells us that 1 mole of hydrogen requires 2 moles of HCl, the number of moles of HCl needed is:
Number of moles of HCl = 2 * (number of moles of hydrogen)
Step 3: Convert the number of moles of HCl to grams.
Mass of HCl = number of moles of HCl * molar mass of HCl
Using these steps, you can calculate the grams of HCl needed to produce 200 grams of hydrogen.
To determine how many grams of hydrochloric acid (HCl) are needed to produce 200 grams of hydrogen gas (H2), we need to use the molar ratios of the balanced chemical equation for the reaction between HCl and H2.
The balanced chemical equation for this reaction is:
2HCl + Zn -> ZnCl2 + H2
Looking at the equation, we can see that it takes 2 moles of HCl to produce 1 mole of H2. We can use this information to calculate the amount of HCl needed.
Step 1: Determine the molar mass of H2. Hydrogen has a molar mass of approximately 2 grams/mol.
Step 2: Calculate the number of moles of H2 required by dividing the given mass (200 grams) by the molar mass:
Number of moles of H2 = 200 grams / 2 grams/mol = 100 moles of H2
Step 3: Use the molar ratio from the balanced equation to determine the number of moles of HCl required. As mentioned earlier, 2 moles of HCl are required to produce 1 mole of H2.
Number of moles of HCl = 100 moles of H2 × (2 moles of HCl / 1 mole of H2) = 200 moles of HCl
Step 4: Convert moles of HCl to grams by multiplying the number of moles by the molar mass of HCl. The molar mass of HCl is approximately 36.5 grams/mol.
Number of grams of HCl = 200 moles of HCl × 36.5 grams/mol = 7300 grams of HCl
Therefore, approximately 7300 grams of hydrochloric acid (HCl) are needed to produce 200 grams of hydrogen gas (H2).