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A 50.0mL aliquot of 0.0500 M NaCN is titrated with 0.100 M HCl. Explain what is the pH when 10.00mL of titrant have been added?A. 9.38 B. 9.03 C. 5.10 D. 8.90 E. 9.21
A solution is prepared by dissolving 11.60g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0-cm^3 sample of the solution is then treated with excess HNO3 and boiled to remove all the dissolved gas.
Determine how much heat is formed by this reaction if a typical packet has 250 g of Fe to warm your hands (or feet for up to 4 h) express your answer in kJ?
The percent ionization of niacin (C6H5NO2), (whose Ka is 1.5 x 10^-5) in a .020 M solution is 2.7%. Calculate the percentage of niacin molecules ionized in a solution that is (a) 0.010 M (b) 1.0 x 10^-3 M
(the freezing point constant is 1.86 C/m). On the basis of these data, one can conclude that the nonelectrolyte has a molecular weight of?
Based on the notion of weak and strong acids and bases, which of the following three actions would you expect to produce the largest ( most negative) ΔHneut. the smallest ΔHneut
What is the pH of a solution formed after titrating 25 mL of 0.150 M acetic acid with 15.0 mL of 0.150 M sodium hydroxide? Ka(acetic acid)=1.76x10-5
What is the experimental yield (in g of precipitate) when 18.6 mL of a 0.634 M solution of barium hydroxide is combined with 19.5 mL of a 0.558 M solution of aluminum nitrate at a 85.4% yield
A possible side product of the aldol reaction of cinnamaldehyde and acetone is the self-condensation of acetone. draw the structure of the side product. explain how the experimental procedure we used is designed to minimize the formation of this s..
A sample of neon effuses from a container in 77 seconds. The same amount of an unknown noble gas requires 157 seconds. identify the gas.
An oxidation-reduction reaction in which 3 electrons are transferred has a deltaG(standard)=+18.55 kJ at 25 C. What is the value of E(standard)
A sample of oxygen is collected over water at a total pressure of 616.8 mmHg at 30 deg Celsius. the vapor pressure of water at 30 deg celsius is 31.8 mmHg. What is the partial pressure of the O2
Calculate the pH and the concentrations of all species present H3O+, F-, HF, Cl-, OH- in a solution that contains 0.10 M HF Ka = 3.5*10^-4 and 0.10 M HCl.
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