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Problem- A 25.0 mL sample of an unknown HBr solution is titrated with 0.100 M NaOH. The equivalence point is reached upon the addition of 15.44 mL of the base.
What is the concentration of the HBr solution?
Show all work, use additional paper if necessary.
Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.47 M HF and 1.21 M KF.
if .43g of aluminum foil was dissolved in sufficient 3M KOH solution, and the solution was acidified with 4M H2SO4, what was the theoretical yield of KAl(SO4)2 * 12H2O
How long would it take for 1.50 of water at 100.0 to be converted completely into steam if heat were added at a constant rate of 16.0
Question- For each of the following, give the electron configuration of the (i) metal; (ii) ion; (iii) a set of 4 quantum numbers representing a valence electron in for the metal ion.
Explain the effect of the following experimental errors on your results: a) You add hexane to the reaction flask instead of 1-hexene b) You use 3% hydrogen peroxide instead of 30% c) You forget to add potassium carbonate in the seperation step.
A buffer solution is prepared by mixing 47.5 mL of 0.772 M carbonic acid with 58.8 mL of 0.0346 M sodium hydrogen carbonate. 1. Calculate the pH (to two decimal places) of this solution. Assume the 5% approximation is valid and that the volumes are a..
Problem- What is the potential of a cell made of Zn / Zn+2 and Cu / Cu+2 half cells at 25 C, if Z+2 = 0.31 M and Cu+2= 0.81 M
The resolution limit of a microscope is approximately equal to the wavelength of light used in producing the image. Electron microscopes utilize an electron beam in place of photons to produce much higher resolution images, about 0.22 nm in modern..
A reaction has a standard free-energy change of -14.00 kJ mol-1 (-3.346 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C.
A 250 gram sample of water at the boiling point had 45.0 kJ of heat added. How many grams of water were vaporized? Heat of vaporization for water is 40.6 kJ/mole
Calculate the equilibrium constant (Kc) and 25 degrees C from the free-energy change for the following reaction: Zn (s) + 2Ag(aq) Zn (aq) +Ag (s)
Use the following balanced chemical equation to answer the following questions: 3 BaCl2 + 2 Na3PO4 Ba3(PO4)2 + 6 NaCl a. How many moles of Ba3(PO4)2 can be produced from 10.0 grams of sodium phosphate
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