At what temperature will water freeze if 100g NaCl are dissolved in 500g H2O?

water's Kf = 1.86 °C/m

Answer : The temperature at which water freeze will be,

Explanation :  Given,

Molal-freezing-point-depression constant for water =

Mass of NaCl (solute) = 100 g

Mass of water (solvent) = 500 g  = 0.500 kg

Molar mass of NaCl = 58.5 g/mole

Formula used :  

where,

= change in freezing point

= freezing point of solution = ?

= freezing point of water =

i = Van't Hoff factor = 2  (for NaCl electrolyte)

= freezing point constant for water =

m = molality

Now put all the given values in this formula, we get

Therefore, the temperature at which water freeze will be,

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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