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A method for determining the quantity of dissolved oxygen in natural waters requires a series of redox reactions. Balance the following chemical equations in that series under the conditions indicated:
(a) In basic solution: Mn2+(aq)+O2(g) -----> MnO2(s)
(b) In acidic solution: MnO2(s)+I-(aq) ------> Mn2+(aq)+I2(s)
(c) In neutral solution: I2(s)+S2O3 2-(aq) ------> I-(aq)+S4O6 2-(aq)
Given the following equilibrium constant at 25 C, calculate the equilibrium constant for the unknown reaction below.
A 1.0 M Na2SO4 solution is slowly added to 10 mL of a solution that is .20 M in Ca^2+ and .30 M in Ag^+. Which compound will precipitate first: CaSO4 Ksp= 2.4 *10^-5 ,Ksp for Ag2SO4 is 1.5*10^-5. How much Na2SO4 solution must be added to initiate ..
how many grams of potassium permanganate are needed to decolorize 1 gram of 2-pentene in basic solution?
This flask is then connected to a second flask, which is evacuated and has a volume of 630. mL. The gas is subsequently allowed to fill both flasks. What is the final pressure of the gas in the first flask? What is the final pressure of the gas in..
HCl solution is added to 100. mL of buffer solution which is 0.10 M in NH3 and 0.1 M in Nh4Cl, what will be the pH of the new solution?
Calculate the minimum pH difference between the stroma and lumen, so that three protons passing through an ATP synthase would provide enough energy for the generation of one ATP molecule
Methyl benzoate - Acid and Base Organic Chemistry, In preparation of methyl benzoate, what is the purpose of 1. washing the organic layer with sodium bicarbonate solution?
the xylene that received has a density of 0.86 g/ml. Its volume is 2.0 ml, and its concentration is 0.069 g/ml. First of all, need to dilute the solution to a 1:100 ratio (ex: 69000 µg/ml to 690 µg/ml). How do dilute the solution to a 1: 100 ratio..
A student measures k for a certain blue dye to be 24.16 M-1 at 560 nm.What is the molarity of the dye in a solution with an absorbance of 0.118 at 560nm?
Predict whether a precipitate will or will not form for each of the following. In addition, determine whether the resulting solution will be saturated or unsaturated.
calculate the expected pH value of the buffer system 5mL .1M CH3COOH + 5mL .1M CH3COO-Na+ using the henderson-hasselbalch equation using the pKa values: carbonic acid= 6.37 and acetic acid=4.75
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.
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