what is the molarity of a solution containing 23g of NaCl in 500 mL of solution? (the molecular mass of NaCl is 58.44.)
molarity = moles solute / L solution
Convert g to moles:
23g NaCL x 1 mol/58.44 g NacL = 0.394 mol
Convert ML to Liter:
500 mL x 1 L /1000 mL = 0.5 L
Therefore...
M= 0.394 mol/0.5L = 0.788 Molarity.. should be the right answer
No of moles = mass / molar mass
= 5.85/58.5
= 0.1 miles
Molarity = no of moles / volume
= 0.1/500 ×1000
= 0.2 M ANSWER
To find the molarity of a solution, we can use the formula:
Molarity (M) = moles of solute / volume of solution in liters
Here are the steps to calculate the molarity:
Step 1: Convert the mass of NaCl from grams to moles.
Given mass of NaCl = 23g
Molar mass of NaCl = 58.44 g/mol
Number of moles of NaCl = Mass of NaCl / Molar mass of NaCl
Number of moles of NaCl = 23g / 58.44 g/mol
Step 2: Convert the volume of the solution from milliliters to liters.
Given volume of solution = 500 mL
Volume of solution in liters = Volume of solution / 1000 mL/L
Volume of solution in liters = 500 mL / 1000 mL/L
Step 3: Calculate the molarity of the solution using the formula.
Molarity (M) = number of moles of NaCl / volume of solution in liters
Molarity (M) = (23g / 58.44 g/mol) / (500 mL / 1000 mL/L)
Simplifying the equation,
Molarity (M) = (23g / 58.44 g/mol) / (0.5 L)
Calculating the value,
Molarity (M) = 0.785 mol / 0.5 L
Molarity (M) = 1.57 mol/L
Therefore, the molarity of the solution is 1.57 mol/L.
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 mass of NaCl to moles.
Given that the molecular mass of NaCl is 58.44 g/mol, we can calculate the number of moles using the formula:
moles = mass / molecular mass
For this problem, the mass of NaCl is 23g. So, we can calculate the moles of NaCl:
moles = 23g / 58.44 g/mol ≈ 0.394 mol
Step 2: Convert the volume of the solution to liters.
Given that the volume is 500 mL, you need to convert it to liters by dividing by 1000:
volume = 500 mL / 1000 mL/L = 0.5 L
Step 3: Calculate the molarity.
The molarity (M) is defined as the moles of solute divided by the volume of the solution in liters:
Molarity = moles / volume
Molarity = 0.394 mol / 0.5 L ≈ 0.788 M
So, the molarity of the solution containing 23g of NaCl in 500 mL of solution is approximately 0.788 M.