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WorksheetsMolality And Molarity (Concentration of Solutions Part 3)
Total questions: 20
Worksheet time: 15mins
Molality (m) = moles of solute / _________________________.
a. kilogram of solvent
b. kiloliter of solvent
c. kilometer of solvent
d.ounces of solvent
Molar mass of NaOH is ______________________
Correct
a. 40 grams/mol
b. 50 grams/mol
c. 45 grams/mol
d. 38 grams/mol
What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?
a. 5 mol/kg. solvent
b. 4 mol/kg solvent
c. 3 mol/kg. solvent
d. 2.5 moles /kg solvent
Molality is defined as ________________________
a. the moles of solute per kilogram of solvent
b. moles of solute per liter of solution
c. mass of solute/ mass of solution
d. mass of solute/ mass of solvent X 100
Molarity is measured in _____.
Incorrect
a. moles per g.
b. mols per L.
c. moles per mm.
d. moles per mL.
How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?
a. 1074 mol
b. 0.069 mol
c. 1.07 mol
d. 62.7 mol.
What do molarity and molality have in common?
a. Both have "kg solvent" in the denominator
b. Both have "moles solute" in the numerator
c. Both have "L solution" in the denominator
d. Both have "moles solution" in the denominator
Which equation is used to find molarity?
a. Moles solute/L solution
b. Moles solute/kg solution
c. Moles solute/kg solvent
d. Grams solute/L solution
Which equation is used to find molality?
a. Moles solute/L solution
b. Moles solute/kg solution
c. Moles solute/kg solvent
d. Grams solute/L solution.
What is a solvent?
a. The substance that does the dissolving in a solution.
b. The mixing of different substances.
c. The process in which neutral molecules lose or gain electrons.
d. The process in which neutral molecules lose or gain electrons.
How do you convert from grams to moles?
a. Divide by the molar mass
b. Divide by Avogadro's number
c. Multiply by the molar mass
d. Multiply by Avogadro's number
What are the units of molality
a. m
b. M
c. ML
d. ml
What are the units of molarity?
a. m
b. M
c. ML
d. ml
What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?
a. 2.0 M
b. 0.22 m
c. 135 m
d. 2.0 m
What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)
Incorrect
a. 0.8 M
b. 1.5M
c. 3.0M
d. 6.0M
A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility
Incorrect
a. lowering the temperature of the solvent
b. stirring the solute in the solution
c. increasing the pressure on the solution
d. increasing the particle size of the solute
What is the molarity of 8 grams of sodium chloride in 7,600 mL of solution?
a. 0.036M
b. 0.036m
c. 0.63m
d. 0.63M
What is the molarity in 650. ml of solution containing 63 grams of sodium chloride?
a. 2.4 M
b. 0.54 M
c. 0.86 M
d. 1.7 M
What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?
a.0.5 mol/kg. solvent
b. 0.4 mol/kg solvent
c. 0.3 mol/kg. solvent
d. 2.5 moles /kg solvent
What is the molality of a solution in which 30.0 moles of NaCl is dissolved in 1.5 Kg of water?
a. 20.0 M
b. 2.2 m
c. 135 m
d. 20.0m
