Consider 100g of 5.5% (mass) solution of NaNO3. Complete the following table, before calculating molarity, molality and mole fraction of NaNO3.
Solute(NaNO3)|Solvent(H2O|Soln
Mass(g) 100g
Moles ----
RefInfo 85g/mol 18.02g/mol
Density=1.00g/mol (This goes under "soln" as reference info).
Ok well I attempted to make a table. I have to fill it in. Can anyone help me fill it out plz?
Ok that looks wrong.
100g should be under solution for the mass, 18.02g/mol for the solvent of H2O and 85g/mol for the solute of NaNO3. I have to find mass of solute and solvent and the moles of solute and solvent. Pls help anyone!
I can't make out some of it but I can get you started and you can fill in the missing parts.
100 g NaNO3 solution that is 5.5% w/w.
That is NOT 100 g NaNO3, that is 100 g of the solution.
5.5% w/w means 5.5 g NaNO3/100 g solution.
So mass solute = 5.5 grams.
moles solute = 5.5/molar mass NaNO3.
mass solution = 100 g
mass solute = 5.5
mass solvent (H2O) = 100-5.5 = ??
moles solvent(H2O) = g solvent/molar mass solvent.
Sure, I can help you fill out the table. Let's start by calculating the moles of NaNO3 in the 100g solution.
To do that, we need to use the mass percent and the molar mass of NaNO3.
Given:
Mass of solution = 100g
Mass percent of NaNO3 = 5.5%
Molar mass of NaNO3 = 85g/mol
Step 1: Calculate the mass of NaNO3 in the solution.
Mass of NaNO3 = (5.5/100) * 100g = 5.5g
Step 2: Calculate moles of NaNO3.
Moles of NaNO3 = Mass of NaNO3 / Molar mass of NaNO3
Moles of NaNO3 = 5.5g / 85g/mol
Now, let's complete the table:
Solute(NaNO3)|Solvent(H2O)|Soln
Mass (g) 5.5g 100g
Moles ? ?
RefInfo 85g/mol 18.02g/mol
To calculate molarity, we need to know the volume of the solution. But in this case, the volume is not given. So, we cannot determine the molarity.
For molality, we need to know the mass of the solvent. In this case, the solvent is water with a mass of 100g.
Molality = moles of solute / mass of solvent (in kg)
Molality = Moles of NaNO3 / (Mass of solvent in g / 1000)
To calculate mole fraction, we need to know the moles of both the solute (NaNO3) and the solvent (H2O).
I hope this helps you understand how to fill out the table and solve the given problem.