What is the concentration of H+ in a solution containing 73.0 g of HCl in 0.5 L of water?
mols HCl = grams/molar mass
Then M = mols/L
To find the concentration of H+ in the solution, we need to calculate the molarity of the solution. Molarity is a measure of the number of moles of solute (HCl) dissolved in one liter of solution (water).
First, we need to calculate the number of moles of HCl in the solution. The formula to calculate the number of moles is:
Number of moles = Mass / Molar mass
The molar mass of HCl can be calculated by adding the atomic masses of hydrogen (H) and chlorine (Cl):
Molar mass of HCl = (atomic mass of H) + (atomic mass of Cl)
= 1 g/mol + 35.5 g/mol
= 36.5 g/mol
Now, let's calculate the number of moles of HCl:
Number of moles = 73.0 g / 36.5 g/mol
≈ 2.00 mol
Next, we need to calculate the molarity of the solution:
Molarity = Number of moles / Volume
The volume of the solution is given as 0.5 L.
Molarity = 2.00 mol / 0.5 L
= 4.00 mol/L
Therefore, the concentration of H+ in the solution is 4.00 mol/L.