Answer to Question #184423 in General Chemistry for Diana Strugariu

Question #184423

In order to depress the freezing point of water to -12°C, how much magnesium nitrate would you have to add to 500g of water?


1
Expert's answer
2021-04-23T07:30:49-0400

"\u2206T_f=T_i-T_{fsol}"


"\u2206T_f=0--12=12\u00b0c"


The cryoscopic constant of water is equal to "1.86\u00b0C" "kg\/mol^{-1}"


van't Hoff factor, of magnesium nitrate is "2"

"Molarity =\\frac{12}{2\u00d71.86}=3.23 mol\/kg"



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