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1: how many moles of na2s2o3 react with each mole of kio3 used in the standrdization?
2: what is the oxidition state of a cl in ocl- ,and s in na2s2O3?
3: if 13.75 ml of Na2S2O3 solution is required to titrate the iodine from 19.85ml of 0.0115M KIO3solution and excess KI what is the molarity of the na2s2o3 solution?
4: how many grams of sodium thiosulfate are needed to make 300 ml of 0.050M solution?
5: is (IO3-) an oxidizing or reducing agent?
what is a cyanide based compound used in synthesis of methadone?
Arrange the molecules in order of decreasing boiling point. Rank the molecules from highest boiling point to lowest boiling point.
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
Calculate the amount of heat to remove from 5 pounds of 232 degrees steam to create 5 pounds of 162 degrees water.
You have a volume of 100 L at a concentration of 100 PPM of benzene. If you later sampled from this known concentration at a temperature of 15° C
You have a solution of 0.085 M HNO2 and 0.15 M KNO2 (Ka for HNO2 = 4.5 * 10-4) what is the pH
Calculate the number of moles of Ascobic acid in the 50.00 ml Sample. Titration Volumes of KIO3 Initial Buret reading/ml trial 1=12.54 trial 2=8.78 Final buret reading/ trial 1=38.74 trial 2=34.93 Volume of KIO used/ml trial 1=? trial 2=?
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30°C and a pressure of 720. torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 794.°C. What is the new pressure of the gas..
An unknown compound contains only carbon, hydrogen, and oxygen(CxHyOz). Combustion of 5.50g of this compound produced 8.07g of carbon dioxide and 3.30g of water.
the frequency factor a is 8.7x 10 12 s- and the activation energy is 63 kj/mol, What is the rate constant for the reaction at 75C
Water is added to 25.0 mL of a 0.776 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution.
20 millilitres of H2SO4 solution was titrated against 0.2M NaOH and required 12.4 millilitres to reach the end point. calculate the concentration of the H2SO4 solution in (a)Molarity (b) g/l.
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