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A 20.0mL sample of 0.20 M sodium acetate is titrated with 0.11 MHCl (aq). Explain what is the pH after the addition of 50.0mL HCl (aq)? (Kbof CH3CO2-= 5.6 ´ 10-10)
What is the concentration of KMnO4 when you mix 2 mL of .160 M KMnO4 with 10 mL of .250 M oxalic acid. Assuming that it took 120 s to observe the color change in the reaction, what is the rate of the reaction
The half-life of carbon-14 is 5715 years. If an animal bone contains 20.0 grams of carbon-14 when the animal dies, how many grams of carbon-14 will be left in 17145 years (3 half-lives)
What is the total pressure in a 16.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2
Calculate the pH of the solution that results when 100.0 mL of 0.15 M NaOH is added to 50.0 mL of 0.25 M HNO3
Calculate the vapor pressure of the solver over the solution at 25 degrees C. The vapor pressire of pure water at 25 degrees C is 23.8 mm Hg
The solubility products of PbSO4 and SrSO4 are 6.3 * 10^-7 and 3.2 * 10^-7, respectively. What are the values of [ SO4 2-], [Pb 2+], and [Sr 2+] in a solution at equilibrium with both substances
Explain when solutions of cobalt (II) chloride and carbonic acid react, which of the following terms will be present in the net ionic equation
the pH of a neutral solution is 7.83. What is the value of Kw at that temperature?
traces of iron and titanium. If the sapphire were found to contain 0.155 g of oxygen, what is the mass of the gemstone?
The reversible conversion of phosphorus pentachloride gas into phosphorus trichloride and chlorine gases has Kc = 2.68 at exactly 340oC. If 8.42mmol PCl5 are placed into a 125ml flask, what will be the partial pressures of each component at equili..
what is the freezing depression if .25 moles of sodium chloride was dissolved in 350ml of
what is the molar concentration of a solution prepared by dissolving 0.100 moles of potassium nitrate in enough water
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