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An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI,and then titrated with Na2S2O3. The unknown metal ion(M2+) is completely unreactive in the titration. However, all of the hypochlorite ion bonded to the metal reacts completely with Na2S2O3. Iodometric titration of an acidified 0.0499 g sample of M(ClO)2 required 28.42 mL of 0.05521 mol/L Na2S2O3 to reach the equivalence point. What is the identity of metal M?
The refining of aluminium from bauxite ore proceeds by the overall reaction: 2Al2O3 + 3C --> 4Al + 3CO2.
A balloon is filled to a volume of 7.00 x 102 mL at a temperature of 20.0 oC. The balloon is then cooled at constant pressure to a temperature of 1.00 x 102 K.
How many mL of 4.50 M sodium hydroxide must be added to 250 mL of a 0.200 M nitrous acid solution to make a buffer with pH = 3.00?
similarly, what happens if cellulose is reacted with maleic anhydride C4H2O3? Again, how is the cellulose molecule/structure altered and what are the reaction by-products?
Given the pK for acetic acid is 4.76. Suppose that we dissolve a mole of this weak acid in 10L of water. Find the pH of the resulting solution.
Using the rydeberg equation calculate the energy of the transition from lowest state, n=1, to the highest, n= infinity, for hydrogen atom.
At 1000 deg. K, a sample of pure NO2 gas decomposes. 2NO2(g)f/r2NO(g) + O2(g) The equilibrium constant Kp is 158. analysis shows that the partial pressure of O2 is 0.14 atm at equilibrium.
Using the inverse square law of radiation, what Geiger counter reading would you get for a radioactive material when you are 3 feet from the source
the radiu of the aluminum atom is 143 pm. Verify that the metal crystallizes as a face-centered cube.
determines how many grams of glucose are in 100 mL of the final solution?
A graduated cylinder contains 133 mL of water. A 17.0 g piece of iron (density = 7.86 {g/cm^3}) and a 23.0 g piece of lead are added. What is the new water level in the cylinder?
What is the rate law of the reaction? b) What is the rate constant for this reaction at 64 degrees Celcius? c) At 64 degrees Celcius if the initial concentration of N2O5 is 0.048 M, how long will it take to drop to 0.024 M?
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