Re: molarity

None of them.
Molarity is defined as moles of solute per litre of solution (not
solvent!). So you must see the resultant volume of the solution (which
is bound to be more than 3.5 L).
Concerning how calculating the moles of solute, it is simple: the
molarity of a solution of NaCl is the number of moles of the unit
formula NaCl per liter of solution; the molarity of ions in such
solution is then just double of this.
Molality is defined as moles of solute per kilogram of solvent (not
solution, this time). This is more precise, since molality is not
affected by temperature, but molarity is very practical for general
use, because it's easier to measure volumes of solution.

Bye
Stefano

.

Relevant Pages

  • Re: molarity
    ... > Molarity is defined as moles of solute per litre of solution (not ... > Molality is defined as moles of solute per kilogram of solvent (not ...
    (sci.chem)
  • Re: How Mercury Causes Brain Neuron Dengeneration
    ... Thanks to all for the chemistry refresher. ... I had forgotten Moles, and ... molarity. ... > that substance in moles per unit volume of solution. ...
    (sci.med.dentistry)
  • Re: How Mercury Causes Brain Neuron Dengeneration
    ... that substance in moles per unit volume of solution. ... The molarity of a ... substance in solution is the number of moles per liter of solution. ...
    (sci.med.dentistry)
  • molarity
    ... becuase NaCl dissociates into 2 ions ... What is the molarity of a salt solution? ... is it the number of moles of all dissociated solutes that are dissolved in ...
    (sci.chem)