How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
To determine how many grams of HCl are needed to make a 2.0 M (mol/L) solution, we need to consider the molar mass of HCl and the desired volume of the solution.
The molar mass of HCl is approximately 36.46 g/mol, which is the sum of the atomic masses of hydrogen (1.01 g/mol) and chlorine (35.45 g/mol).
To calculate the grams of HCl needed, we can use the following formula:
Grams of HCl = Molarity (mol/L) * Volume (L) * Molar mass (g/mol)
In this case, the desired volume is 1 liter, and the molarity is 2.0 M. Let's substitute these values into the formula:
Grams of HCl = 2.0 mol/L * 1 L * 36.46 g/mol
Grams of HCl = 72.92 g
Therefore, you would need approximately 72.92 grams of HCl to make 1 liter of a 2.0 M HCl solution.