15G OF NACL OCCUPY A VOLUME OF 75 Ml what is the molarity solution ?
15 g of NaCl occupy a volume of 75 mL , What is the molarity solution ?
Please don't write in all caps. It makes the question difficult to read.
mols NaCl = grams/molar mass
Change mL to L.
Then M = mols/L solution.
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To find the molarity of a solution, you need to know the amount of solute (in moles) and the volume of the solution (in liters).
Step 1: Convert the given volume from milliliters (mL) to liters (L).
You are given that the volume of the solution is 75 mL. To convert this to liters, divide by 1000 since there are 1000 mL in a liter.
75 mL ÷ 1000 = 0.075 L
Step 2: Convert the given mass of the solute to moles.
You are given that the mass of NaCl is 15 g. To convert this to moles, divide by the molar mass of NaCl, which is the sum of the atomic masses of sodium (Na) and chlorine (Cl).
Na: atomic mass = 23 g/mol
Cl: atomic mass = 35.5 g/mol
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
moles of NaCl = 15 g ÷ 58.5 g/mol
Step 3: Calculate the molarity.
Molarity (M) is defined as moles of solute per liter of solution, so divide the moles of NaCl by the volume in liters.
Molarity (M) = moles of solute / volume of solution (in liters)
Molarity (M) = moles of NaCl / 0.075 L
Now, plug in the values to find the molarity:
Molarity (M) = (15 g ÷ 58.5 g/mol) / 0.075 L
Simplify the expression:
Molarity (M) ≈ 3.42 mol/L (rounded to two decimal places)
Therefore, the molarity of the NaCl solution is approximately 3.42 M.