Report Sheet o Identification of Substances by Physical Properties When water an
ID: 982694 • Letter: R
Question
Report Sheet o Identification of Substances by Physical Properties When water and bromoform are mixed, two layers form. Is the bottom layer water or bromoform? What solvent would you use to determine the density of zinc chloride? The density of a solid with a melting point of 42degree to 44 degreeC was determined to be 0.87 0.02 g/mL. What is the solid? The density of a liquid whose boiling point is 55degree to 57 degreeC was determined to be 0.77 0.05 g/mL. What is the liquid? Which has the greater volume-10 g of hexane or 10 g of toluene? What is the volume of each?Explanation / Answer
8.
bromoform will come because bromoform is having higher density than water
water density is 1 bromoform density is 2.89
which ever density is more that will come down
9.
Cyclohexane is better
because while measuring the density that particular compound shouldnt soluble in the whaterver solvent we are using, from the table it is clear that zinc chloride will not soluble in cyclohexane
10.
Lauric acid
from the table melting point of lauric acid is 43 ºC and density is 0.88 which is mached with given data
11
Acetone
in the table boiling point of acetone is 56 ºC and density is 0.79
12.
to find out this we have use the following formula
density = mass / volume
10 grams hexane
volume = mass / density = 10 / 0.66
= 15.1515 mL
now comming to
10 gram of toluene
volume = 10 / 0.87
= 11.4942 mL
so hexane is more volume than toluene