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1. A solid mixture may contain AgNO3, NiSO4, KCl, and Ca(NO3)2. Treatment of the solid with water leaves a white insoluble residue. The water soluble portion is colorless and gives a precipitate when treated with 1 M Na2CO3. Identify the components of the mixture.
2. Which of the acids that can be used to dissolve an alloy (i.e., mixture of metals) produces the largest number of volatile compounds containing cations of the qualitative analysis scheme?
3. Which compound of silver is the least soluble in both water and dilute strong acid?
4. Identify the cation and anion. Express the answer in terms of the formula of the salt. A green powder dissolves in water and gives a pure white precipitate with acidic AgNO3. When the solution is heated with H2O2 and NaOH, it turns a yellow color, which changes to orange in acid.
5. Consider the following mixture; FePO4 and AlCl3. Would it dissolve completely in water? Would it dissolve in 6 M HNO3 but not in water? Would it dissolve in 6 M NaOH? Would it dissolve in 6 M NH3?
Which of the following solvents would be the best choice to extract a slightly-polar organic compound from an aqueous solution? Explain why each of other solvents is less desirable than the solvent you have chosen.
Carbon oxide (carbon (II) oxide) can be purified of oxygen impurities by having it react with cobalt (II) oxide. If the impure carbon oxide contains a volume of 1.5% oxygen, and if it reacts with cobalt (II) oxide at 250 °C and 500 kPa.
Calculate the number of moles of an ideal gas in a 250. mL sealed container that has a pressure of 788 torr and a temperature of 72.1 degrees F.
The specific heat of liquid water is 4.184 J/g x C. Calculate the energy required to heat 10.0 g of water from 26.5 C to 83.7 C.
Use condensed formulas or line angle formulas to illustrate the saponification reaction of the fatty acid that is BOTH an OMEGA-6 AND AN 18:2 FATTY ACID
Enantiometrically pure retrosynthesis, There are many ways of making (R)3-ethyl-4-methylpent-1-yne. Explain what enantiomerically pure retrosynthesis is and show
Calcium fluoride CaF2 is an insoluble salt. The Ksp is 3.4 x 10^-11. Calculate the molar solubility of calcium fluoride.
How many moles of CO(NH2)2 are present in 145 g of water, if the freezing point of the solu- tion is -4.02?C? kf (water) = 1.86 K · kg/mol.
Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35 individual xenon atoms.
If the equilibrium constant for a one electron redox reaction at 298k is 8.7*10^4, calculate the corresponding change in G and Ecell
A solution of calcium ions contains 5 meq/650. cm3 of calcium ion. How many moles of calcium ion does this solution contain?
what is the formula for the complex formed from chromium (iv), two moles of water,
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