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In a chemcial analysis of a chromium alloy, all of the chromium is first converted to chromate ions. a 50ml sample of chromate ion solution is then reduced in a basic solution to chromium (lll) hydroxide by reaction with 22.6ml of 1.08mol/l sodium sulfite in this reactio, the sulfite ions are oxidized to sulfate ion. what is the ammount conventration of the chromate ion solution?
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. Write the balanced overall cell ..
Using 250 mL of 0.250 M solution of CoCl2 and distilled water, how would you prepare 100 mL of 0.005M solution of CoCl2. What absorbance would you expect the solution to have
What is the theoretical yeild of NO2 from the reaction of 43.9 g of NH3 with 258 g of O2?
How much heat is required to raise the temperature of a 7.40-g sample of iron (specific heat = 0.450) from 25C to 79.8C?
If the ka for the acid phenol (call it HP) is 1.3 x 10-10, what is the pka of the phenolate ion (P-)
Several oxidation reductions take place. List three examples of oxidation reduction reactions that are involved. Show what is oxidized what is reduced, and indicate which enzyme (E1, E2, E3) is involved.
A mixture of 3 peptides (A) KFTS, (B) NELS, (C) GDSF were separated using an anion exchange column at pH 8. List the order of elution for the three peptides.
A saturated solution of Mg(OH)2 is prepared and allowed to equilibriate at 25 degrees celcius. A 25.00 mL sample of the 25 degrees celcius solution is titrated with 0.00508M HCL solution. 1.38 mL of the HCL solution are required to fully react the..
The pH of the solution at the equivalence point. e) The pH of the solution after 40.0 mL of HCl are added.
What is the pH of a 0.3656 M solution of the sodium salt of a weak acid with a pKa of 3.745? The answer is not pH = pKa + log(salt)
Important information about Chem problem, A 25 mL sample of .13M HCl is mixed with 15mL of .24M NaOH. The pH of the resulting solution will be nearest. The answer is 11.9
2NO2 + Cl2 = 2NOCl The inital pressure of NO2 was 1.577 atm and the inital pressure of Cl2 was 0.427 atm. At equilibrium, the partial pressure of NOCl is 0.624 atm. Calculate K.
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