Dilution of Concentrated Solutions The number of moles of solute in liters of a solution of...
Dilution of Concentrated Solutions
The number of moles of solute in liters of a solution of molarity is given by
Moles Solute = m x v
It is often of practical importance to take a concentrated solution of known concentration, and to add solvent to it to obtain a diluted solution with a desired concentration. During the process of dilution, since only solvent is added, the number of moles of solute is constant.
Using to denote the concentrated solution, and to denote the diluted solution, this becomes
Mc x Vc = Md x Vd
If three of the above quantities are known, then it is possible to solve for the fourth quantity.
Note that any consistent set of volume units may be used in this equation, since the conversion factor from one unit to the other appears on both sides of the equation and will cancel out.
In the laboratory, a student dilutes 25.7 mL of a 6.22 M hydrobromic acid solution to a total volume of 150.0 mL. What is the concentration of the diluted solution?
Concentration = ___________M
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Dilution of Concentrated Solutions
The number of moles of solute in liters of a solution of...
The concentration of a solution after dilution can be found by: where M1 is the concentrated...
The concentration of a solution after dilution can be found
by:
where M1 is the concentrated solution (in
this lab, 0.400 M), and V1 is the volume of the
concentrated solution placed in the test tube. The
V2 is the total volume of
concentrated solution plus water added, and M2
is the concentration of the solution after diluting.
Tube 1 has 2.00 mL of the 0.400 M Ni2+ solution and
8.00 mL of water added. What is the concentration of...
Dilution is a process in which the concentration of a solution is lowered by adding more...
Dilution is a process in which the concentration of a solution is lowered by adding more solvent. Some of the reasons dilutions are performed are to minimize measurement errors when preparing a series of solutions at different concentrations, to save time and laboratory space, and to make more accurate measurements on an analytical balance when the target concentration is very low. The new concentration of a diluted solution can be determined from the following equation, sometimes called the dilution equation,...
12. Molarity, M, is defined as A. moles of solute dissolved in 1 mol of solvent....
12. Molarity, M, is defined as A. moles of solute dissolved in 1 mol of solvent. B. moles of solute dissolved in 1 kg of solvent. C. moles of solute dissolved in 1 L of solvent. D. moles of solute dissolved in 1 L of solution. E. moles of solute dissolved in the solution. 13. What volume of 2.50 M NaOH (40.00 g/mol) contains 0.100 mole of NaOH? A. 0.250 L D. 0.250 mL B. 40.0 mL E. 0.0400 mL...
Concentrations of solute in solvent, whether in saturated solutions or not, can be expressed in many...
Concentrations of solute in solvent, whether in saturated solutions or not, can be expressed in many ways (molarity, molality, ppm, percent by mass, etc.). Molarity = moles of solute / liter of solution molality = moles of solute / kg of solvent ppm = mg solute / liter of solution ppb = microgram of solute / liter of solution %-by-mass = (grams of solute / grams of solution) x 100% To convert from %-by-mass to Molarity, assume 100g of solution,...
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of th...
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of the solution. Concentrations are typically expressed as Mass al.) (% m/m) which is the mass of the solute (g) divided by the mass of the solution [solute+ solvent] (g)x 1000/0; or as Volume ol.) (% v/v ) which is the volume of the solute in a fixed volume of solution (1O0mL of solution) x 1000/0; or less commonly in the laboratory,...
1. 2. Using the equation C1V1 = C2V2, calculate the volume (V1) of concentrated solution and...
1.
2.
Using the equation C1V1 = C2V2, calculate the volume (V1) of concentrated solution and the volume of water needed to dilute the following solutions: Concentration Volume (in mls) Concentration of Volume (in mls) of Volume (in mls) of diluted of desired available stock stock solution required of solvent solution desired solution (V2) solution (C1) to make the diluted required to (C2) solution (V1) achieve desired volume (V2-V1) 5 mg/ml 100 ml 1000 mg/ml 15% 10 ml 50% 0.250...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
1 of 4) Watch the video that shows using the dilution method to make a solution...
1 of 4) Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnOhas a concentration of 2.6 x 104m. The pipette has a volume of 10.0 mL. What is the amount of KMnO4 delivered to the solution, in moles? mol Submit
1 of 4 Watch the video that shows using the dilution method to make a solution...
1 of 4 Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnO, has a concentration of 2.6 10-4 M. The pipette has a volume of 10.0 mL. What is the amount of KMnO, delivered to the solution, in moles? mol X resubmit
You wish to make a 0.249 M hydrobromic acid solution from a stock solution of 12.0...
You wish to make a 0.249 M hydrobromic acid solution from a stock solution of 12.0 M hydrobromic acid. How much concentrated acid must you add to obtain a total volume of 50.0 mL of the dilute solution? __mL You wish to make a 0.112 M nitric acid solution from a stock solution of 12.0 M nitric acid. How much concentrated acid must you add to obtain a total volume of 150 mL of the dilute solution? __mL In the...
The concentration of a solution after dilution can be found
by:
where M1 is the concentrated solution (in
this lab, 0.400 M), and V1 is the volume of the
concentrated solution placed in the test tube. The
V2 is the total volume of
concentrated solution plus water added, and M2
is the concentration of the solution after diluting.
Tube 1 has 2.00 mL of the 0.400 M Ni2+ solution and
8.00 mL of water added. What is the concentration of...
12. Molarity, M, is defined as A. moles of solute dissolved in 1 mol of solvent. B. moles of solute dissolved in 1 kg of solvent. C. moles of solute dissolved in 1 L of solvent. D. moles of solute dissolved in 1 L of solution. E. moles of solute dissolved in the solution. 13. What volume of 2.50 M NaOH (40.00 g/mol) contains 0.100 mole of NaOH? A. 0.250 L D. 0.250 mL B. 40.0 mL E. 0.0400 mL...
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of the solution. Concentrations are typically expressed as Mass al.) (% m/m) which is the mass of the solute (g) divided by the mass of the solution [solute+ solvent] (g)x 1000/0; or as Volume ol.) (% v/v ) which is the volume of the solute in a fixed volume of solution (1O0mL of solution) x 1000/0; or less commonly in the laboratory,...
1.
2.
Using the equation C1V1 = C2V2, calculate the volume (V1) of concentrated solution and the volume of water needed to dilute the following solutions: Concentration Volume (in mls) Concentration of Volume (in mls) of Volume (in mls) of diluted of desired available stock stock solution required of solvent solution desired solution (V2) solution (C1) to make the diluted required to (C2) solution (V1) achieve desired volume (V2-V1) 5 mg/ml 100 ml 1000 mg/ml 15% 10 ml 50% 0.250...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
1 of 4) Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnOhas a concentration of 2.6 x 104m. The pipette has a volume of 10.0 mL. What is the amount of KMnO4 delivered to the solution, in moles? mol Submit
1 of 4 Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnO, has a concentration of 2.6 10-4 M. The pipette has a volume of 10.0 mL. What is the amount of KMnO, delivered to the solution, in moles? mol X resubmit
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