what is the molarity of a solution made by mixing 178.5 of 1.5 M NaCl with 283.4m of 4.3M NaCl
Mnacl*L nacle =(1.5)(.001718)=.0026775
moles nacl=(4.3)*(.002834)=.0121862
total moles = .0026775+.0121862=.0148moles
final volume = .001785+.002834=.004819 L
m/l= 3.21779
I don't think this is rite but please check it I moved two places to the left because the problem is ml and I thought it had to be in Liters
plz help
You're right. The volume is in mL and it must be in L; therefore, move the decimal three places to the left.
178.5 mL = 0.1785 L
283.4 mL = 0.2834 L.
Amber, I know it is against your principles to use the cap key; however, nacl, nacle, etc doesn't mean a thing to me. I can guess but sometimes that isn't good enough. Note that I respond with caps at the beginning of a sentence, periods at the end, and non-text type writing between so it will be as plain as possible to readers. You should do the same if you want responsible answers to your questions.
so would the answer be M/L= 3.22
or .0322 ?
To determine the molarity of a solution, you need to calculate the moles of solute and the volume of the solution.
In this case, you correctly calculated the moles of NaCl for each solution: 1.5 M NaCl solution has 0.0026775 moles and 4.3 M NaCl solution has 0.0121862 moles.
However, when calculating the total moles, you made a mistake. The correct calculation should be: 0.0026775 moles + 0.0121862 moles = 0.0148637 moles (rounded to 0.0149 moles).
For the final volume, you correctly added the volumes in liters: 0.1785 L + 0.2834 L = 0.4619 L (rounded to 0.462 L).
Now, to calculate the molarity (M) of the solution, you divide the moles of solute by the volume in liters:
Molarity (M) = moles of solute / volume in liters
Molarity = 0.0149 moles / 0.462 L ≈ 0.0323 M
So, the correct molarity of the solution is approximately 0.0323 M.
Remember to double-check your calculations and units to ensure accuracy.