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Molarity

Q. If 45.52 mL of a potassium permanganate solution is needed to titrate 2.145 g of ferrous ammonium sulfate hexahydrate, (NH4)2Fe (SO4)2. 6H2O calculate the molarity of the KMnO4 solution.

Solved • Apr 17, 2020

Molarity

Q. ) If you have to prepare 100 mL of a 0.5 M solution of CuSO4•5H2O using water as the solvent, calculate the amount of solid needed.

Solved • Apr 15, 2020

Molarity

Q. Determine the concentration of Cl−in each aqueous solution. (Assume complete dissociation of each compound.) 0.25 M NaCl 0.25 M CuCl2

Solved • Apr 14, 2020

Molarity

Q. Calculate the mass of NaCl in a 39 −mL sample of a 1.5 M NaCl solution.

Solved • Apr 14, 2020

Molarity

Q. Calculate the number of grams of copper(II) sulfate pentahydrate, CuSO4•5H2O, required to prepare 100 mL of a 0.10 M solution.

Solved • Apr 13, 2020

Molarity

Q. The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000 times. A basic solution of luminol is often sprayed onto surfaces that are suspected of containing minute amounts of blood. Luminol has a molecular weight of 177 g/mol. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units.

Solved • Apr 13, 2020

Molarity

Q. The following five beakers, each containing a solution chlorine (NaCl, also known as table salt), were found on a lab shelf: Arrange the solutions in order of decreasing concentration. Rank from most concentrated to least concentrated. To rank items as equivalent, overlap them.

Solved • Apr 13, 2020