Starting with a 25.0 mL 5.0 M CuSO4 solution, show how you would prepare 25.0 mL...
Starting with a 25.0 mL 5.0 M CuSO4 solution, show how you would prepare 25.0 mL of each of the following solutions: 2.5 M, 1.0 M, 0.5 M CuSO4.
Assuming you have only one 25.0 mL flask to prepare three solutions, should you prepare the most concentrated or dilute solution first? Explain.
Does the volumetric flask have to be dry before you use it to prepare the next solution? Explain.
When using a pipet that has the marking TD on it, should you blow out the remaining liquid in the tip? Explain
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Starting with a 25.0 mL 5.0 M CuSO4 solution, show how you would
prepare 25.0 mL...
A student was asked to prepare 1.0 L of a 2.0 M CuSO4 solution. The student...
A student was asked to prepare 1.0 L of a 2.0 M CuSO4 solution. The student placed 40.0 g of CuSO4 crystals in a volumetric flask and filled it with water to the 1000–mL mark. Was the resulting solution 2.0 M? Explain. 
1. You are provided with 1M solution of CuSO4. 2. Calculate how many grams of CuSO4...
1. You are provided with 1M solution of CuSO4. 2. Calculate how many grams of CuSO4 are dissolved in 100 mL of water to prepare this solution. Show your work in the space provided below. (Molar mass of CuSO4 = 159.6086 g/mol) (1 mark) Scso this . cutissu 159.6 خرداكولات و 3. Using a suitable transfer pipette transfer V. mL of your 1M Cuso. solution into a 100 ml volumetric flask. CV C 2V2 4. Using the equation CiV1=C2V2 calculate...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each of seven 100-mL volumetric flasks. Add 2,4, 6, 8, and 10 mL, respectively, of the salicylic acid stock solution to 5 of the labeled flasks. Calculate the concentrations of the standard solutions. Use a pipet to place 10 mL of the unknown solution into another volumetric flask and label Unknown 1. Dilute each solution to the mark with DI water. The seventh flask that...
In order to prepare your KIO3solution for titration, you pipet 10.00 mL of a 0.2732 N...
In order to prepare your KIO3solution for titration, you pipet 10.00 mL of a 0.2732 N KIO3stock solution and dilute it to the mark using a 250-mL volumetric flask. What is the concentration of the resulting KIO3solution that you will use in the experiment?
You have 659.3 mL of a stock solution 4.660 M HCl. For a particular experiment, your...
You have 659.3 mL of a stock solution 4.660 M HCl. For a particular experiment, your lab partner prepared a diluted solution for you to use. In her notes, you read: " Using a volumetric pipet, took 246.54 mL of stock solution and diluted it to 739.21 ml in a volumetric flask. Then, took 100.00 mL of that solution and diluted it to 194.63 mL in a second volumetric flask. " What is the concentration that you should report for...
Calculate the initial concentration of iron(III) in solution #1, #2, #3. Beaker (mL) Table 1. Reagent...
Calculate the initial concentration of iron(III) in
solution #1, #2, #3.
Beaker (mL) Table 1. Reagent Solutions Provided by the Stockroom Solution Name Reagent [Reagent] (M) Volume (mL) Standard iron Fe(NO3)3 2.50 x 10 in 0.10 M HNO3 nitric acid HNO3 0.10 120 35 50 250 conc. SCN KSCN 0.50 30 50 dilute SCN KSCN 2.50 x 10-3 30 50 Worksheet 1 #1 5.00 #2 10.00 #3 15.00 Dilute iron (mL) [Fe**] (M) [Fe(SCN)?*] (M) %T 480 58.9 35.8 21.5...
1. How much anhydrous CuSO4 in grams are required to prepare 700.0 mL of 0.30 M...
1. How much anhydrous CuSO4 in grams are required to prepare 700.0 mL of 0.30 M CuSO4 solution? Molar mass of CuSO4 = 159.62 g 2. A student determined the molar absorptivity of a copper (II) sulfate solution to be 2.81 M-1 cm-1 . If the absorbance of the given solution was 0.703, what was the concentration of the given solution? Assume the path length of solution 1.0 cm. 3. Why should you rinse the cuvette before you fill it...
1- How many milliliters of an aqueous solution of 0.122 M aluminum chloride is needed to...
1- How many milliliters of an aqueous solution of 0.122 M aluminum chloride is needed to obtain 13.9 grams of the salt? 2- In the laboratory you dissolve 15.7 g of barium sulfide in a volumetric flask and add water to a total volume of 250 . mL. What is the molarity of the solution? 3- In the laboratory you dilute 4.43 mL of a concentrated 6.00 M hydroiodic acid solution to a total volume of 50.0 mL. What is...
ANSWER ALL QUESTIONS 7-12 or don’t bother 7. If 25.0 mL of 1.50 M CuSO4 is...
ANSWER ALL QUESTIONS 7-12 or don’t bother
7. If 25.0 mL of 1.50 M CuSO4 is diluted to 250.0 mL with pure water, what is the molar concentration of CuSO4 after dilution? 8. A gas occupies a volume of 2.5 L at a pressure of 1.0 atm. What volume will it occupy, at the same temperature, at a pressure of 0.25 atm? 9. A 400 cm3 steel cylinder holds 1.50 g of ethanol, C2HsOH, vapor at 250 °C. What is...
In the lab, you prepare a solution in a 150 mL volumetric flask by mixing 25.0...
In the lab, you prepare a solution in a 150 mL volumetric flask by mixing 25.0 mL of 1.35 M NaIO4, then diluting to the mark on the flask. The following equilibrium occurs: IO−4 (aq)+2 H2O (l)⇌H4IO−6 (aq) Kc=3.5×10−2 The equilibrium concentration of H4IO6: Calculate K for the following reaction: SnO2(s)+2CO(g)⇌Sn(s)+2CO2(g) SnO2(s)+2H2(g)⇌Sn(s)+2H2O(g) K=8.12 Sn (s) + 2 H_2O (g) K = 8.12 H2(g)+CO2(g)⇌H2O(g)+CO(g) K=0.771
1. You are provided with 1M solution of CuSO4. 2. Calculate how many grams of CuSO4 are dissolved in 100 mL of water to prepare this solution. Show your work in the space provided below. (Molar mass of CuSO4 = 159.6086 g/mol) (1 mark) Scso this . cutissu 159.6 خرداكولات و 3. Using a suitable transfer pipette transfer V. mL of your 1M Cuso. solution into a 100 ml volumetric flask. CV C 2V2 4. Using the equation CiV1=C2V2 calculate...
Use a volumetric pipet to deliver 2 mL of 4 M sodium hydroxide solution to each of seven 100-mL volumetric flasks. Add 2,4, 6, 8, and 10 mL, respectively, of the salicylic acid stock solution to 5 of the labeled flasks. Calculate the concentrations of the standard solutions. Use a pipet to place 10 mL of the unknown solution into another volumetric flask and label Unknown 1. Dilute each solution to the mark with DI water. The seventh flask that...
Calculate the initial concentration of iron(III) in
solution #1, #2, #3.
Beaker (mL) Table 1. Reagent Solutions Provided by the Stockroom Solution Name Reagent [Reagent] (M) Volume (mL) Standard iron Fe(NO3)3 2.50 x 10 in 0.10 M HNO3 nitric acid HNO3 0.10 120 35 50 250 conc. SCN KSCN 0.50 30 50 dilute SCN KSCN 2.50 x 10-3 30 50 Worksheet 1 #1 5.00 #2 10.00 #3 15.00 Dilute iron (mL) [Fe**] (M) [Fe(SCN)?*] (M) %T 480 58.9 35.8 21.5...
ANSWER ALL QUESTIONS 7-12 or don’t bother
7. If 25.0 mL of 1.50 M CuSO4 is diluted to 250.0 mL with pure water, what is the molar concentration of CuSO4 after dilution? 8. A gas occupies a volume of 2.5 L at a pressure of 1.0 atm. What volume will it occupy, at the same temperature, at a pressure of 0.25 atm? 9. A 400 cm3 steel cylinder holds 1.50 g of ethanol, C2HsOH, vapor at 250 °C. What is...
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