How do you find the concentration of a solution??(chemistry)?

  • Thread starter Thread starter DeeP
  • Start date Start date
D

DeeP

Guest
molarity = number of moles/number of litres.

your solution has 250 g in .5 L or 500 g in 1 litre..
now, we need to convert the grams into number of moles-
the formula for this is:
number of moles = ( grams of the compound/ molecular weight of the compound)
in your solution, number of moles =(500/mol wt of Nacl) =(500/58.44)=8.55
the molarity of your solution is 8.55.
 
what is the concentration of a solution that has 250 g of NaCl dissolved in .5L of water?

is it 250 x .5=125 M? Molarity is concentration rightt? And grams x liters = molarity?

Thats probably wrong...please correct me if it is!
 
250g in 0.5l NaCl =500g/Liter

molar mass of NaCl = 23+35.5=58.5g/L

so 500/58.5=8.547M / liter
 
the concentration is the same as molarity, yes.
it is the number of moles over the volume.
 
Back
Top