An aqueous nacl solution is made using 112 g of nacl diluted to a total solution volume of 1.00 l. calculate the molarity, molality, and mass percent of the solution. (assume a density of 1.08 g> m
Solved
Show answers
More tips
- F Family and Home How to Keep Your Home Warm: Tips and Tricks...
- D Dating, Love, Relationships Does a Person s Character Depend on the Color of Their Eyes?...
- O Other Childhood Fears: What Many of Us Experienced...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
Answers on questions: Chemistry
- C Chemistry Help! I have been stuck on these two questions and this is due in an hour!! I will appreciate any help!...
- C Chemistry a solution of AICI is combined with a solution of KOH. Identify the precipitate and the spectator ions in the resulting reactions....
- C Chemistry When the equation fe + o2→fe2o3 is balanced, the coefficient for o2 is: a. 4 b. 3 c. 1 d. 2 d?...
- C Chemistry What type of coal contains the least amount of carbon? ( a. lignite ( b. peat ( c. anthracite?...
- C Chemistry The economy is in a recession. The government enacts a policy to increase purchases by $2 billion. The MPC is 0.8. What would be the full increase in real GDP from the...
- C Chemistry A cup of hot water is placed next to a cup of cold water. After a while, the temperatures of water in both cups are equal. What kind of system does this describe?...
- C Chemistry What are the molecular and electron geometry of thioformaldehyde?...
- C Chemistry If you made a compound with sodium and phosphate, how many sodium ions would there be...
- C Chemistry DON T WORRY, THERE S MORE I JUST CAN T FIT IT ALL INTO ONE QUESTION-...
- C Chemistry I need help Please help me lol...
Ответ:
molarity is defined as the number of moles of solute in 1 L of solution.
the NaCl solution volume is 1.00 L
number of moles NaCl = NaCl mass present / molar mass of NaCl
NaCl moles = 112 g / 58.5 g/mol = 1.91 mol
the number of moles of NaCl in 1.00 L of solution is - 1.91 mol
therefore molarity of NaCl is 1.91 M
Q2)
molality is defined as the number of moles of solute in 1 kg of solvent.
density is mass per volume.
density of the solution is 1.08 g/mL.
therefore mass of the solution is = density x volume
mass = 1.08 g/mL x 1000 mL = 1080 g
since we have to find the moles in 1 kg of solvent
mass of solvent = 1080 g - 112 g = 968 g
number of moles of NaCl in 968 g of solvent - 1.91 mol
therefore number of NaCl moles in 1000 g - (1.91 mol / 968 g) x 1000 g/kg = 1.97 mol/kg
molality of NaCl solution is 1.97 mol/kg
Q3)
mass percentage is the percentage of mass of solute by total mass of the solution
mass percentage of solution = mass of solute / total mass of the solution
mass of solute = 112 g
total mass of solution = 1080 g
mass % of NaCl = 112 g / 1080 g x 100%
therefore mass % of NaCl = 10.4 %
answer is 10.4 %
Ответ:
The molarity of the solution is 1.9 molL-1, the molality of the solution is 1.96 m. The mass percent of the solution is 10.3%.
The molarity of the solution is obtained from; Number of moles /Volume of solution
Number of moles = Mass/molar mass = 112 g/58.5 g/mol = 1.9 moles
Molarity = 1.9 moles/1.00 L = 1.9 molL-1.
The molality of solution = Number of moles/Mass of solvent in Kg
Density of solution = Mass/volume
Mass of solution = Density × volume = 1.08 g/mL × 1000 mL = 1080 g or 1.08 Kg
Mass of solvent = 1080 g - 112 g = 968 g or 0.968 Kg
Molality = 1.9 moles/0.968 Kg = 1.96 m
Mass percent of the solution = Mass of solute/Mass of solution × 100
= 112 g/1080 g × 100 = 10.3%
Learn more: link
Ответ: