How many grams are in 50.0 mL 2.0 M of HCl?
Please help me!!! I think the answer is 3.57g but I am not sure.
Thank you :)
mols HCl = M x L = 2.0M x 0.050L = 0.10
g = mols x molar mass = 0.1 x 36.5 = 3.65.
H = 1
Cl = 35.5
HCl = 36.5 g/mol.
To determine the number of grams in 50.0 mL of 2.0 M HCl, we need to use the molarity and the molar mass of HCl.
To start, let's calculate the number of moles of HCl in 50.0 mL of 2.0 M solution:
Molarity (M) = moles of solute / liters of solution
Rearranging the equation, we have:
moles of solute = Molarity (M) * liters of solution
Since we are given 50.0 mL and the molarity is 2.0 M, we convert the volume to liters by dividing by 1000:
50.0 mL = 50.0 mL * (1 L / 1000 mL) = 0.050 L
Now, we can calculate the moles of HCl:
moles of HCl = 2.0 M * 0.050 L = 0.1 moles
Next, we need to find the molar mass of HCl. The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl):
Molar mass of HCl = (1.00784 g/mol for hydrogen) + (35.453 g/mol for chlorine) = 36.46 g/mol
Finally, we can calculate the grams of HCl:
grams of HCl = moles of HCl * molar mass of HCl = 0.1 moles * 36.46 g/mol = 3.646 g
So, the correct answer is 3.646 grams of HCl, not 3.57 grams as you initially guessed.
I hope this helps!