I have a concentration of saltwater (NaCI) in that there was 23 g of salt dissolved in .025 L of water.
How many atoms were dissolved?
Is this how you set it up???
.39 x(6.022x10^23)
I think that will give you the number of "molecules" of NaCl. I would think twice that would be the number of atoms dissolved if we call the ions in solution atoms. Technically there were no "atoms" dissolved, only ions.
I am a little confused ... the previous questions were
What is the concentration in W/V units?
(23g/250ml)x100 = 9.2% w/v
How many moles of NaCi were dissolved?
(23g/1) x (1mol/58.54g)+ .39moles
Then it was
How many atoms were dissolved?
and this is zero because there are no atoms only ions??????
I agree with the 9.2% w/v as well as the number of mols NaCl. I assume this is a beginning chemistry course and I also assume that the author of the problem just "made a mental error" in writing the problem and PROBABLY meant to ask how many ions were dissolved which will be twice the number of mols and that times 6.02E23. As I posted earlier, however, there are no atoms dissolved. Even the solid NaCl crystal has no atoms because the solid NaCl crystal is composed of sodium ions and chloride ions. In solution, the crystal lattice bonds have been broken and the Na^+ ions and Cl^- ions have become solvated and you have floating around Na^+(H2O)n and Cl^-(H2O)n
Ohhhh Ok thank you sooo much :) makes more sense Thank you again
To calculate the number of atoms dissolved in a solution, you need to use the Avogadro's number, which is 6.022 x 10^23 atoms/mole.
First, you need to determine the number of moles of salt (NaCl) dissolved in the water. This can be done using the formula:
moles = mass / molar mass
The molar mass of NaCl is the sum of the atomic masses of sodium (22.99 g/mol) and chlorine (35.45 g/mol), which is approximately 58.44 g/mol.
So, for your given concentration of saltwater with 23 g of salt dissolved in 0.025 L of water:
moles = 23 g / 58.44 g/mol
moles = 0.394 mol (rounded to three significant figures)
Next, you can multiply the number of moles by Avogadro's number to calculate the number of atoms:
number of atoms = 0.394 mol x 6.022 x 10^23 atoms/mol
Calculating this expression gives you the exact number of atoms dissolved in the solution.
Therefore:
number of atoms = 0.394 mol x 6.022 x 10^23 atoms/mol