Calculate the molarity of the solution.

29 g of NaCl (g.f.w. = 58.5 g/mol) in 0.030 liters.

0.015 M
17 M
67 M

Question

Calculate the molarity of the solution.

29 g of NaCl (g.f.w. = 58.5 g/mol) in 0.030 liters.


0.015 M
17 M
67 M

anonymous · Answer

First you want to find the moles of 29g of NaCl. Then you can plug it into the equation for molarity which is moles of solute/liter of solution.

anonymous · Answer

how do you do that???

anonymous · Answer

Find the moles of NaCl?

anonymous · Answer

How do you do that?!?

anonymous · Answer

29 g of Nacl * molar mass of NaCl= answer

anonymous · Answer

I think she needs you to set it up in a equation

anonymous · Answer

I just did.

anonymous · Answer

Then you take that answer and put it over the liters of solution.

anonymous · Answer

this is my question.... how would you find the molar mass of NaCl?

anonymous · Answer

The molar mass is the sum of the atomic mass' of the Na+Cl

anonymous · Answer

which is X grams/moles

anonymous · Answer

moles = given wt/mol. Wt

Mol.wt of nacl=23+35.5=58.5 gm

Moles = 29/58.5 = 0.495 = 0.5 moles (approx)

anonymous · Answer

ok... i got the molar mass as 58.442 so will i do 29 * 58.442

anonymous · Answer

@aussy123  you've got something a little wrong there hun

anonymous · Answer

Oh sorry I missed 0.015M