Question

In a solution consisting of 10.81g of Na2SO4 and 800g of H2O, which is the solute? Type the name of the compound or molecule?

Answer 1

You dissolve sodium sulfate, a SALT, in water. Which do you think is the solvent?

Explanation:

And we calculate the concentration of `"sodium sulfate"`...the which is certainly `"the solute..."`

`C_"sodium sulfate"="moles of sodium sulfate"/"volume of solution"`

And we assume, reasonably, that the volume of the solution remains at `800*mL`

And so `[Na_2SO_4]=((10.81*g)/(142.04* g*mol^-1))/(800*mLxx10^-3*L*mL^-1)=0.0951*mol*L^-1`...

And what is the concentration with respect to `Na^(+)(aq)`??