Describe how you would prepare 150 mL of a 0.025M stock solution of potassium chloride (formula weight: 74.55 g/mole). Using this stock solution, describe how you would prepare 5 mL of the following dilutions: 5mM and 5 x 10^2 uM.

Q: How much oxalic acid dihydrate, in grams, is needed to prepare 728 mL of a 0.829 M solution? Oxalic…

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Q: What mass in grams of the dihydrate H2C2O4 • 2 H2O (molar mass = 126.0 g/mol) is needed in order to…

A: Molarity (M) is a concentration term for a solution. The molarity of a given solution is defined as…

Q: The stock solution of sulphuric acid has a concentration of 5.0 M. Explain how would you prepare 500…

A: Formula to be used: C1V1 = C2V2

Q: 2.5 g of NaOH were recovered after the 200 mL of a solution of NaOH completely evaporated.what was…

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Q: Consider the following: you mix 9.90 mL of CHC13 (d = 1.492 g/mL) and 5.20 mL of CHBr3 (d = 2.890…

A: total volume = 9.90 + 5.20= 15.10 mL mass of CHCl3 = 1.492 x 9.90 = 14.77 g mass of CHBr3 = 2.890 x…

Q: What is the mass % of propylene glycol in a 2.77 M solution of propylene glycol (MM = 76.09 g/mol)…

A: Mass percent shows the mass of solute present during a given mass of solution.  Mass percent is…

Q: A student needs to prepare 50.0 mL50.0 mL of a 0.80 M0.80 M aqueous H2O2H2O2 solution. Calculate the…

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Q: You are asked to prepare a 1.000L solution of 45 M CHOs (glucose, molar mass 180 16 g/mol) in a lab…

A: The number of moles of glucose is calculated as shown below. The number of moles of glucose is 4.50…

Q: 4. A solution is prepared at 25°C by mixing 20 g of K2SO4 with 150 cc of water. The density of water…

A: Molality of solution represents the moles of solute per kilograms of solvent. Thus, molality is an…

Q: 150 140 130 120 110 100 NANO, 90 80 70 60 NH&C -ка Naci 50 40 30 20 KCIÓ 10 Cez(so O 10 20 30 40 50…

A: Solubility of a solute in a solution is defined as the amount (gram) of solute dissolved in 100 gram…

Q: a You have 100 mL of 0.54 M sodium lactate solution. If you add water until the total volume reaches…

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Q: Calculate the composition of the following solution in mass/mass %:   59.0 g KCl per 3.00  ×  102…

A: Given :mass of solute, KCl  = 59.0 g        Volume of solution = 3 × 102 mL   Density of solution=…

Q: Give the volume of the solute and volume of the solvent for  a 0.50 M solution of HCl that would…

A: The neutralisation reaction between HCl and Ba(OH)2 is, 2HCl + Ba(OH)2 ---> BaCl2 + 2H2O   Now,…

Q: What is the %v/v of a solution made from 66.1 g of ethylene glycol (density is 1.11 g/mL) in water…

A: Given data,Mass of ethylene glycol=66.1gDensity of ethylene glycol=1.11g/mLTotal volume=500mL

Q: An aspirin sample, 0.62 g, was turrares with 28 mL of 0.105 M NaOH solution. What is the percent…

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Q: When an ionic compound such as sodium chloride (NaCl) is placed in water, the component  atoms of…

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Q: 1. What mass of solute would you need to make each of the following aqueous solutions? Show yo…

A: [a.] No. of moles of NaI   = 1.25 mol/L × 0.100 L = 0.125 mole  So, Mass of NaI (solute)  = 0.125…

Q: Hannah needs to make a solution of KMnO4 to be used in a chemistry experiment. On the shelf in her…

A: Basically when we need to make solution of another lower concentration from a higher concentrations…

Q: What mass in grams of the dihydrate H2C2O4 • 2 H2O (molar mass = 126.0 g/mol) is needed in order to…

A: Here is your answer.........

Q: 200.0 mL of a 0.700 M solution of KCI is diluted to 600.0 mL. What is the new concentration of the…

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Q: There is a 12 M aqueous HCl solution in the stock room, but a 1.0 M solution is required for an…

A: Given, a 12 M aqueous HCl solution in the stock.we are askesd to calculate the volume of stock…

Q: determine at what temperature would each of the following solubility levels be observed? Solubility…

A: The solubility of 140 g kNO3 in 100 g of water . From the above Solubility vs Temperature graph we…

Q: Calculate the molarity of a solution prepared by dissolving 14.5 g of BaCl_2 in 250 mL of solution.

A: Mass of BaCl2 = 14.5 g Volume of BaCl2 = 250 mL Molar mass of BaCl2 = 208.23 g/mol

Q: You are a work study student in our chemistry department. Amy, your supervisor has just asked you to…

A: Molarity (M) of a solution is defined as the number of moles of solute dissolved per volume of the…

Q: What volume of a 1.63 mass % solution of Mg(NO3)2 is needed to contain 0.316 grams of Mg(NO3)2. The…

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Q: Two solutions are combined: 637 mL of 147 mM MgSO4 and 501 mL of 160 mM NH4OH. What is the…

A: volume of MgSO4 = 637 mL molarity of MgSO4 = 147 mM volume of NH4OH = 501 mL molarity of NH4OH = 160…

Q: A student task is to prepare 3 glucose (C6H12O6) solutions with different concentration. If the…

A: i) he needs 2.88g glucose to make 80mL of solution ii) He needs 0.405g of glucose to make 90mL of…

Q: grams of Ca(NO2)2 is needed to make 800. mL of a 2.00 M Ca(NO2)2 solution

A: • 211.3424 grams of Ca(NO2)2 is needed to make 800. mL of a 2.00 M Ca(NO2)2…

Q: Calculate the number of moles required to make 150 mL of a 5.5M solution of CuSO4. For all answers…

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Q: Please describe how do you prepare one liter of solution containing 8.00 mM Cu2+

A: The required solution is as follows:

Q: An aqueous solution contains 6.00% NaBr, the density of the solution is 1,046g/cm^3. What is the…

A: 6 % by mass NaBr means 6 g of NaBr is present in 100 g of solutionMass of solute (NaBr) present =…

Q: Exactly 42.35 mL H2SO4 is neutralized with 21.15 mL of 0.500 M NaOH, what is the normality of H2SO4?

A: Given: Volume of H2SO4 V1=42.35mL Volume of NaOH V2= 21.15mL Molarity of NaOH M2= 0.500M To find:…

Q: Calculate the volume of ~1.25× 10–3 M K2CrO4 stock solution needed to prepare 10.00 mL of dilute…

A: Given : Concentration of K2CrO4 stock solution = 1.25 X 10-3 M Concentration of CrO42- ion in final…

Q: Your group's task is to prepare 100.00 mL of 0.250 M solution of sucrose, C12HO11. You are to use a…

A: Interpretation -  To determine the number of mole of sucrose are required and mass of sucrose…