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A Student dispenses 24.95 mL of a hydrochloric acid solution with an unknown concentration into an Erlenmeyer flask. The student then titrates the HCl solution with 0.168 M sodium hydroxide. If 24.33 mL of NaOH is required to reach the equivalence point, what was the concentration of HCl solution? All work must be shown for full point values.
assign oxidation numbers to all the elements in each of the following compounds or polyatomic ions: a)C2H3O2^- b)AlCl3 c)NH4^+ d)HBrO4
Predict the partial vapour pressure of HO above its solution in liquid germanium tetrachloride of molality 0.10 mol kg-I
What is the final temperature (in oC) of a 41.6 g sample of iron (specific heat = 0.444 J/(g K)) which evolves (-12.18) J of heat when it cools from 91.4oC
What is the osmotic pressure of a solution made from dissolving 95.0 g of glucose, C_6H_{12}O_6, in 725 mL of water at 39.0 degrees C?
There are two carboxylic acid functions in 3-nitrophthalic acid. The pKa of the acid function at the 2-position is approximately 2, whereas that at the 1-position is about 3. Which of the two is the more acidic and why
How long will it take for 100% pearlite to form at 650 °C and at 600 °C? Estimate the hardness values resulting from these transformations.
What is the radius of the cross section of a cylinder that has a volume of 644.0 m3 and a height of 12.6 m? (Volume=πr2×height)?
draw a sheme o both reactions inlcuding structures and names of all possible products of monosubustitution only. Choose one reaction and provide appropriate mechanism including all resonance strucutres.
What is the net ionic equation for the following redox reation in basic solution? CrO4{2-} oxidizesHSnO3{-} and reduces to CRO2{-}
A saturated solution of silver(I) hydroxide, AgOH has a pH of 10.15. What is the value of the equilibrium constant, Ksp, for this system?
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, more accurately steel). As a result the sacrifical metal corrodes instead of iron. Explain
The managing director of a well-known company on Wall Street thrives on a diet of fruit jam, bread, pasta, and coffee. She exercises intermittently.
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