To be able to see a measurable effect your boiling point elevation must be at le

Question

To be able to see a measurable effect your boiling point elevation must be at least 1.00degree C Knowing that the K_b of water is 0.512 degree C middot kg/mole. what must be the molality of the calcium chloride solution? Assume complete Association calcium chloride in water and that the density of water is 1.00 g/mt. Insert your numerical answer, including appropriate significant figures and units. Use the correct chemical formula (not name) and unit abbreviations. To be able to see a measurable effect, your boiling point elevation must be at least 1.00degree C. Knowing that the K_b of water is 0.512 degree C middot kg/mole, determine what mass of calcium chloride (in g) is needed to see at least a 1.00degree C boiling point increase in 21.70 mL of water. Assume complete dissociation of calcium chloride in water and that the density of water is 1.00 g/mL. Insert your numerical answer.

Explanation / Answer

Ans 2 elevation in boiling point = i . Kb .m

For CaCl2 ,i = 3 as it dissociates completely

So let's put into above formula

1 = 3× 0.512 × m

m = 0.65 mol/ kg

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