How many grams of HCl must be added to make 1 liter of a 2.0 M HCl solution
mols HCl needed = M x L = ?
moles = grams/molar mass
Solve for grams.
To determine the number of grams of HCl needed to make a 2.0 M HCl solution, we need to know the molar mass of HCl and the desired final volume.
The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl). The atomic mass of hydrogen is approximately 1 gram/mole, and the atomic mass of chlorine is approximately 35.5 grams/mole. So, the molar mass of HCl is approximately 36.5 grams/mole.
To find the number of moles of HCl required, we can use the formula:
moles = Molarity * Volume
Here, Molarity is given as 2.0 M, and Volume is 1 liter.
moles = 2.0 M * 1 L = 2.0 moles
To convert moles to grams, we multiply by the molar mass:
grams = moles * molar mass
grams = 2.0 moles * 36.5 grams/mole = 73 grams
Therefore, you would need to add approximately 73 grams of HCl to make 1 liter of a 2.0 M HCl solution.