Which of the following aqueous solutions are | vedclass

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(D) Two solutions are isotonic if they have the same osmotic pressure $(\pi = iCRT)$.For $0.01 \ M$ glucose: $\pi_a = 1 	imes 0.01 	imes RT = 0.01 \

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$(a)$ and $(c)$

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(D) Two solutions are isotonic if they have the same osmotic pressure $(\pi = iCRT)$.For $0.01 \ M$ glucose: $\pi_a = 1 	imes 0.01 	imes RT = 0.01 \ RT$.For $0.01 \ M \ NaNO_3$: $\pi_b = 2 	imes 0.01 	imes RT = 0.02 \ RT$.For $0.3 \ g$ urea $(Molar \ mass = 60 \ g/mol)$ in $500 \ mL$ $(0.5 \ L)$: $Molarity = \frac{0.3 / 60}{0.5} = \frac{0.005}{0.5} = 0.01 \ M$.For urea: $\pi_c = 1 	imes 0.01 	imes RT = 0.01 \ RT$.Since $\pi_a = \pi_c$,solutions $(a)$ and $(c)$ are isotonic.

Which of the following aqueous solutions are isotonic $(R = 0.082 \ atm \ K^{-1} mol^{-1})$?

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