At 40o C, the density of heavy water is 1.02 g/ml and its ionic product is 5.1 × 10−15. Which of the

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At 40o C, the density of heavy water is 1.02 g/ml and its ionic product is 5.1 × 10−15. Which of the following if the only incorrect information regarding heavy water at 40o C?

Accepted Answer

$(a)\left\lbrack D_{2}O ightbrack = \frac{d}{M} = \frac{1.02 	imes 10^{3}	ext{ g/L}}{20	ext{ g/mol}} = 51	ext{ M}$$(b)K_{d} = K_{w}/\left\lbrack D_{2}O ightbrack = \frac{5.1 	imes 10^{- 15}}{51} = 10^{- 15} $$${(c)\left\lbrack D^{+} ightbrack = \left\lbrack OD^{-} ightbrack = \sqrt{K_{w}} }{	herefore\alpha = \frac{\sqrt{K_{w}}}{C} = \frac{\sqrt{5.1 	imes 10^{- 15}}}{51} = \frac{10^{- 8}}{\sqrt{51}} }{(d)	ext{Molality = }\frac{1000}{20} = 50	ext{ m}}$$

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