How many grams of potassium permanganate (KMnO4) are required to prepare a 250-mL solution whose concentration is 2.16 M?
How many grams of potassium permanganate (KMnO4) are required to prepare a 250-mL solution whose concentration...
How many grams of MgBr2 are required to prepare a 250. mL solution with a concentration of 2.16 M?
Make a 100ml .000924M solution of potassium permanganate (KMnO4). How many grams of (KMnO4) are needed?
Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 1500. mL of a 0.400 M KMnO4 solution. What mass of KMnO4, in grams, do you need? After, What is the molar concentration of a solution of sulfuric acid, H2SO4, if 5.95 mL react completely with 0.132 g of NaOH which was dissolved in enough water to make 200.mL of solution?
How many grams of potassium permanganate (F.W. 158.0) would you need to make 250 mL of a 246 mM solution? Enter your numerical result in grams without the unit to a precision of 0.01 g.
A solution of potassium permanganate (KMnO4) whose concentration is 1.28X10^-4 M has a transmittance of 0.5 at a wavelength of 522 nm, in a 1.0 cm cell. a) What absorbance does this solution have? b) If the absorbance were double, what would be the transmission? c) What concentration would correspond to a transmittance of 0.75 in this cell?
A patient is to prepare one liter of a 1:5000 potassium permanganate (KMnO4) solution as a foot soak. You have a stock solution of KMnO4,5%. How many milliliters of the stock solution must be used to prepare one liter of the foot soak?
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that is 2.0%w/v? Do NOT include any units, just answer with the NUMBER of grams, for example: 4.2 or 13 or 220. Type your response What is the new concentration, if solvent is added to 20.0 mL of a solution that is 4.0%w/v, until the total volume of the solution is 100.0 mL? (DO NOT include any units with your answer.) Type your response 25...
Potassium permanganate(KMNO4)is has a solubility of 6.4 g/ 100 g of water at 20ºC, and 250 g / Literof water at 65ºC(Use 1.00 g/mL as the density of water) a)Can you dissolve more or less potassium permanganateby increasing the temperature of the solution? Clearly show your calculations or reasoning. b)What mass of potassium permanganatecan dissolve in 65 g of water at 20ºC? c)What mass of potassium permanganate will precipitate out of a solution made by dissolving 21.3 g of potassium...
How to prepare 250 mL of 1 M potassium nitrate solution. Then use the 250 mL to prepare 100 mL of 10 mM potassium hexacyanoferrate solution.
please help and explain. Thank you
A chemist prepares a solution of potassium permanganate (KMnO4) by measuring out 21. umol of potassium permanganate into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's potassium permanganate solution. Be sure your answer has the correct number of significant digits. xs ?