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The ferrous ion, Fe2+(aq) reacts with the permanganate ion, MnO4- (aq), in an acidic solution to produce the ferric ion, Fe3+(aq). A 6.893 g sample of ore was mechanically crushed and tehn treated with concentrated hydrochloric acid, which oxidized all of the iron in the ore to the ferrous ion, Fe2+(aq). Next the acid solution containing all of the ferrous ions was titrated with .100 M KMnO4 solution. The end point was reached when 13.899mL of the KMnO4 solution was used.
a. write the oxidation half reactionb. write the reduction half reactionc. write the balanced final redox reactiond. Identify the oxidizing agent, the reducing agent, the species being oxidized, and the species being reducede. Caculate the number of moles of iron in the sample or oref. Calculate the mass percent of the iron in the ore
Assume that the system benzene and chlorobenze at 100 degree celcius obeys Raoult's law. for a binary mixture with an overall mole fraction Z=.30 determine
An aqueous solution is 5.80% methanol (CH3OH) by mass with d= 0.988 g/ml. What is the molarity of CH3OH in this solution
Calculate the solubility (in grams per 1.00*10^2 mL) of magnesium hydroxide in a solution buffered at pH=10. How does this compare to the solubility of Mg(OH)2 in pure water
The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 5.63×10^-6m that must be absorbed to melt 3.30g of ice.
Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the C^14 has decayed to 1/16.0 of the original amount. How long ago was this plant alive. Express your answer numerically in years.
A particulate water sample that is saturated in CaF2 has a Ca2+ content of 105 ppm (that is, 105 g Ca2+ per 10^6 g of water sample).
In acidic solution an aldonic acid is converted to a gamma lactone. Draw the structure of the gamma lactone formed from galactose, and draw a mechanism for its formation.
Perform a similar analysis of a stripping column. In this case, 100 lbmol/h of water with a concentration of 0.0045 lbmol SO2/ft3 is stripped with air to a concentration of 0.0005 lbmol SO2/ft3. The air flow rate is 1.5 times the minimum.
What is the final temperature of the water and pieces of metal?
If 545 mL of oxygen gas is collected at 21°C and 745 mmHg , what is its volume at STP?
Calculate the number of moles of sodium hydroxide used in the titration. b. How many equivalents of unknown acid were titrated? c. Determine the equivalent mass of the unknown acid
magnesium oxide decomposes to form 7.29 of magnesium, what mass of oxygen gas is also released in the reaction?
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