4.30 grams of NH4Cl is added to 14.5 grams of water. Calculate the molality of the solution
mols NH4Cl = 4.30g/molar mass NH4Cl= x.
m = mols NH4Cl/kg solvent.
To calculate the molality of a solution, you need to know the following:
1. The mass of the solute (NH4Cl)
2. The mass of the solvent (water)
3. The molar mass of the solute (NH4Cl)
Let's calculate the molality of the solution using these values:
1. The mass of NH4Cl is given as 4.30 grams.
2. The mass of water is given as 14.5 grams.
3. The molar mass of NH4Cl can be calculated by adding up the atomic masses of its individual elements. The atomic masses of nitrogen (N) and hydrogen (H) can be found on the periodic table. The atomic mass of chlorine (Cl) is also on the periodic table but with caution since Chlorine exists in various isotopes. To get accurate results, you need to consider the specific isotopic composition of Chlorine. However, for simplification purposes, we'll use an average atomic mass. The molar mass of NH4Cl is around 53.49 grams/mol.
Now, we can proceed to calculate the molality of the solution:
Molality = (moles of solute) / (mass of solvent in kg)
To calculate the number of moles of NH4Cl, divide its mass by its molar mass:
moles of NH4Cl = 4.30 grams / 53.49 grams/mol
Next, convert the mass of water into kilograms:
mass of water in kg = 14.5 grams / 1000
Now you have all the necessary information to calculate the molality:
Molality = (moles of NH4Cl) / (mass of water in kg)