How do you make a 100mL solution of 1.50 M of NaCl.
You want how many moles?
moles = M x L = 1.50 x 0.1 = 0.150 moles.
How many grams is that?
moles = grams/molar mass; therefore, g = moles x molar mass and 0.10 moles x molar mass = ??
Take ?? g NaCl, place in a 100 mL volumetric flask, add some water, swirl until all of the solute is dissolved, then make to the mark on the volumetric flask with DI water.
8.766
To make a 100 mL solution of 1.50 M NaCl, you will need to calculate the mass of NaCl required and then dissolve it in water. Here's how you can proceed:
Step 1: Determine the molar mass of NaCl.
The molar mass of sodium chloride (NaCl) is the sum of the atomic masses of sodium (Na) and chlorine (Cl). The atomic mass of Na is 22.99 g/mol, and the atomic mass of Cl is 35.45 g/mol. Therefore, the molar mass of NaCl is 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.
Step 2: Use the formula: Molarity (M) = moles/volume (L).
To make a 1.50 M solution, you need 1.50 moles of NaCl for every 1 L of solution.
Step 3: Calculate the moles of NaCl needed for a 100 mL solution.
Since the desired volume is 100 mL (or 0.100 L), you can use the formula from Step 2 to find the moles:
moles = Molarity * volume
moles = 1.50 mol/L * 0.100 L = 0.150 moles
Step 4: Calculate the mass of NaCl needed.
Using the molar mass of NaCl calculated in Step 1, you can convert the moles of NaCl to grams:
mass = moles * molar mass
mass = 0.150 mol * 58.44 g/mol = 8.77 grams
Therefore, to make a 100 mL solution of 1.50 M NaCl, you would need to dissolve 8.77 grams of NaCl in water and then adjust the final volume to 100 mL.