What mass of HCL is contained in 645 mL of 0.266 M solution?
is this the correct answer
6.27 g HCl
You have not shown us how you got that answer.
Method you could use:
moles = (liters)(molarity)
mol. HCl = (0.645L)(0.266mol/L) = _____ mol HCl
(____ mol HCl)(35.453g/mole) = ______?
6.08 moles of HCL
To find the mass of HCl in the given solution, we need to use the equation:
mass = volume x concentration x molar mass
First, let's find the molar mass of HCl. The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl), which are 1.01 grams/mole and 35.45 grams/mole, respectively. So, the molar mass of HCl is (1.01 + 35.45) grams/mole = 36.46 grams/mole.
Next, let's convert the volume from milliliters (mL) to liters (L). There are 1000 mL in a liter, so 645 mL is equal to 645/1000 = 0.645 L.
Now we can substitute the values into the equation:
mass = volume x concentration x molar mass
= 0.645 L x 0.266 M x 36.46 g/mol
Calculating this, we find:
mass = 6.94 grams
Therefore, the mass of HCl contained in 645 mL of 0.266 M solution is 6.94 grams.