Question

Green checks and red X's are not displayed for part d of this question. Lab 3: Colligative Property Freezing point depression can be used to experimentally determine the molar mass of a solute in solution. Given the data in the table, please answer the questions below and determine the identity of an unknown alkali metal chloride compound. Experimental Results Mass of solvent (water): 33.175 g Mass of solution: 35.163 g Boiling point of water: 100.00 C Boiling point elevation constant (Kb) of water: 0.512 C/m Boiling point of solution: 101.05 C (a) What is the boiling point elevation, ?Tb, of the solution? °C (b) What is the molality, m, of the solution? (Please check the alkali metal salt choices in part d to determine the van't Hoff factor.) m (c) How many moles of the chloride salt are in the solution? mol (d) What is the unknown salt? LiCl (42.39 g/mol) NaCl (58.44 g/mol) KCl (74.55 g/mol) RbCl (120.92 g/mol)

          Green checks and red X's are not displayed for part d of this question.

Lab 3: Colligative Property
Freezing point depression can be used to experimentally determine the molar mass of a solute in solution. Given the data in the table, please answer the questions below and determine the identity of an unknown alkali metal chloride compound.

Experimental Results
Mass of solvent (water): 33.175 g
Mass of solution: 35.163 g
Boiling point of water: 100.00 C
Boiling point elevation constant (Kb) of water: 0.512 C/m
Boiling point of solution: 101.05 C

(a) What is the boiling point elevation, ?Tb, of the solution?
°C

(b) What is the molality, m, of the solution? (Please check the alkali metal salt choices in part d to determine the van't Hoff factor.)
m

(c) How many moles of the chloride salt are in the solution?
mol

(d) What is the unknown salt?
LiCl (42.39 g/mol)
NaCl (58.44 g/mol)
KCl (74.55 g/mol)
RbCl (120.92 g/mol)

Green checks and red X's are not displayed for part d of this question.

Lab 3: Colligative Property
Freezing point depression can be used to experimentally determine the molar mass of a solute in solution. Given the data in the table, please answer the questions below and determine the identity of an unknown alkali metal chloride compound.

Experimental Results
Mass of solvent (water): 33.175 g
Mass of solution: 35.163 g
Boiling point of water: 100.00 C
Boiling point elevation constant (Kb) of water: 0.512 C/m
Boiling point of solution: 101.05 C

(a) What is the boiling point elevation, ?Tb, of the solution?
°C

(b) What is the molality, m, of the solution? (Please check the alkali metal salt choices in part d to determine the van't Hoff factor.)
m

(c) How many moles of the chloride salt are in the solution?
mol

(d) What is the unknown salt?
LiCl (42.39 g/mol)
NaCl (58.44 g/mol)
KCl (74.55 g/mol)
RbCl (120.92 g/mol)

Added by Elisa D.

Question

Please give Ace some feedback