An aqueous solution at 25 °C has a H,0' concentration of 4. × 10 M. Calculate the OH concentration. Be sure your answer has the correct number of significant digits.

Q: How would you prepare 100 mL of a 0.05 M aqueous solution of iron from a 0.7 M solution? It…

A: Molarity of stock solution = 0.7 M Volume of stock solution = unknown

Q: A student wants to make a 0.600 M aqueous solution of barium sulfate, BaSO4, and has a bottle…

A: final volume = 85.7 mL

Q: In the US, alcohol proof is equal to twice the percent of alcohol (ethanol) by volume, so for…

A: Percentage volume by volume: is one of the ways to express concentration of solution. Formula is:…

Q: ind the molarity of a 40.0% by mass aqueous solution of sulfuric acid, H2SO4, for which the density…

A: The molarity is the concentration term which is defined as the number of moles of solute present in…

Q: 2. A brine solution is 13.0 % (w/w). How much salt is there in a sample which weighs 150 grams?…

A: The given data : The %(w/w) of the solution = 13.0 % The mass of the sample = 150 g. To determine =…

Q: Determine the volume of 0.210 M KOH solution required to neutralize each sample of sulfuric acid.…

A:

Q: Calculate the molarity of a solution containing 1.2 moles of NaCi in 730 ml of solution?

A: Definition: Molarity is a concentration term for a solution. The molarity of a given solution is…

Q: Calculate the concentration in /μmol/L of the chemist's magnesium fluoride solution.

A: Given :- number of moles of MgF2 = 0.00387μmol  Volume of solution = 100 mL  To be calculated :-…

Q: Five standard solutions of HBr are prepared by serial dilution in which, at each stage, 10.00 mL is…

A: Molarity is the term which is used to express concentration of the chemical compound in a solution.…

Q: What will be the final volume of a solution prepared by diluting 28.6 mL of 8.05 M sodium hydroxide…

A: Detail mathematical calculation is shown below

Q: Ms. Dunne added 2233.8 milliliters of water to 16.2 milliliters of NaOH solution to make a 3.60 x…

A: The equation for calculating molarity is the ratio of the moles of solute whose molarity is to be…

Q: Mass of Erlenmeyer flask: 25.52 g Mass of Erlenmeyer Flask + Calcium Hydroxide Solution (lime…

A: Mass of Ca(OH) 2 = 2.92 g Density of Ca(OH) 2= 1 g/ml As we know        Density = mass/ volume We…

Q: Calculate the molarity of an aqueous solution that is 15.6% by mass calcium chloride. You might need…

A:

Q: 1) If 56.2 mL of BaCl2 solution is needed to precipitate all the sulfate ion in a 746 mg sample of…

A:

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 molarity of a solution prepared by dissolving 213.3 grams of Fe(OH)3 in enough water to…

A: The concentration of the solution is defined as the amount of solute present in the solution. In a…

Q: What is the molarity of an H2S04 solution if it takes a volume of 70.0 ml of 0.50 M NaOH to fully…

A:

Q: At 25 °C, the density of a 80.0 % (m/m) solution of sucrose, C12H22011, in water is 1.41 g/mL. What…

A: Molarity of a solution can be determined by dividing the number of moles of solutewith the volume of…

Q: What is the concentration of NaCl for a density of 1.058g/mL

A:

Q: A geochemist measures the concentration of sait dissolved in Lake Parsons and finds a concentration…

A:

Q: A chemist prepares a solution of potassium iodide (KI) by measuring out 7.2x10^2 μmol of potassium…

A:

Q: Calculate the concentration of NH3, NH4+ and OH- in a solution

A: number of moles = mass/molar mass  molar mass of NH3 = 17g/mol

Q: You have a standard stock 1.65 M solution of NaH2PO4. For an experiment you require 236 mL of a 0.82…

A: Given that -  Molarity of the stock NaH2PO4 Solution = 1.65 M  Molarity of diluted NaH2PO4 solution…

Q: Why is it more accurate to say that the concentration of a solution of acetic acid is 0.01 F rather…

A: Acetic acid in solution exists as mixture of undissociated acetic acid and dissociated acetic acid…

Q: to the image below 3. Which of the following best describe the solution to your final answer in…

A:

Q: Say you have 2.50 M CaSO, solution and you need 300. mL of 0.400 M CaSO, How can you prepare this…

A: Molarity is the number of moles of solute dissolved per volume of the solution.  Molarity is a way…

Q: .600 M NaCi aqueous SC www 0.997 g / cm3

A: When non volatile solutes are added to a pure solvent ,the solution formed have lower freezing point…

Q: 168 mL of a 1.6 M solution of acetic acid, CH3CO2H, (molar mass 60.05) is diluted to 224 mL.…

A: Given: Initial concentration, M1 = 1.6 M The initial volume, V1 =168 mL Final concentration, M2 = ?…

Q: JOH1 Acid/Base 3.45 x 105 3.64 x 1012 1.24 x 10 3 2.57 x 109

A: ★ [H+] = 3.45 × 10-5  pH = - log (3.45 × 10-5) = 4.46  So, It is acid. [OH-] = 10-14/3.45 × 10-5 =…

Q: In her chemistry class, Rachel is preparing a special solution for an experiment that she has to…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: What is the concentration (M) of a NaCl solution prepared by dissolving 9.3 g of NaCl in sufficient…

A: Given that  Mass of NaCl = 9.3g  Volume of solution = 350ml

Q: NeC 2. Another common unit of concentration is % mass/volume (m/v). Calculate the % mass/volume for…

A: Since you have posted multiple questions, we will answer only first one for you. If you want any…

Q: Answer the following question: How many moles of ammonia are in 500. mL of a 2.25 M aqueous ammonia…

A:

Q: Five standard solutions of HBr are prepared by serial dilution in which, at each stage, 10.00 mL are…

A: Five standard solutions of HBr are prepared by serial dilution in which, at each stage, 10.00 mL are…

Q: 8. The density of methanolc acid, HCOOH Is 1.22 g/mL If 33.5 mL of methanoic acid is dissolved in…

A:

Q: What is the dilution factor needed to change a 1:2 dilution to a 1:10?

A: To change 1:2 dilution to a 1:10, we have to dilute solution by a factor of 5.

Q: 0.010 M CaCl2 (Ksp 4.68 x 10-6 for Ca(OH)2) Express your answer In molarity to two significant…

A: Chemical equation:-  Ca(OH)2 = Ca2+ + 2OH-

Q: A chemist adds 315.0mL of a 0.00335μM copper(II) fluoride CuF2 solution to a reaction flask.…

A: Moles can be found out by multiplying volume with molarity.

Q: 3. If a researcher starts with 3.00 mL of a 4.50 mg/mL protein solution and adds 10.0 mL of water,…

A:

Q: stuons. applic Observe the use of significant figures for calculations and indicate the appropriate…

A: Molarity is defined as ratio of number of moles to that of volume of solution (L).

Q: If acetic acid is the only acid that vinegar contains (K. = 1.8 x 10 '), calculate the initial…

A: Let  initial concentration  of acetic  acid is A.

Q: A 7.91 mass % aqueous solution of ethylene glycol (HOCH2CH2OH) has a density of 1.36 g/mL. Calculate…

A: Density is defined as mass per unit volume. Mathematically, it is expressed by equation (1).Molarity…

Q: A chemist prepares a solution of iron(II) bromide FeBr2 by measuring out 224.μmol  of iron(II)…

A: Number of moles of FeBr2 = 224 x 10-6 mol Volume of water = 200 mL = 200 x 10-3 L

Q: A chemist prepares a solution of aluminum chloride (AlCl3) by measuring out 35.2 g of aluminum…

A: Given: Weight of the aluminum chloride is 35.2 g. Volume is 100 mL.

Q: A chemist must dilute 29.5 mL of 11.7 µM aqueous zinc oxalate (ZnC,04) solution until the…

A: In the dilution process, the relationship between initial and final concentrations and volumes of…

Q: chemist prepares a solution of iron(II) bromide  FeBr2  by measuring out  20.9g  of iron(II)…

A: *    Concentration = Moles of soluteVolume (L)* No. of moles = weightmolar mass* Molar mass of FeBr2…

Q: If you are going to dilute 125 mL of 1.50 M AgNO3 solution so that the final volume is 215 mL, what…

A: Given;

Q: 6. Moles of NaOH dispensed (mol) 7. Molar concentration of acid solution (mol/L) 8. Average molar…

A: The number of moles of a substance is the mass of the substance upon its molar mass. The molarity of…

Q: 6.626x10*“J/s × 299,792,458 m/s 487.9×10 m

A: The given expression has been solved below in a step wise manner and the solution is provided below.

Q: A chemist adds 490.0mL of a 0.339M silver perchlorate AgClO4 solution to a reaction flask. Calculate…

A: Given that,490.0mL of 0.339M silver per chlorate solution.