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1: If 2.00 mL of a 0.40 M NaOH solution is added to 65.0 mL of a buffer solution that contains 0.10 M HCN and 0.10 M NaCN, calculate the change in pH of the solution (i.e. pH[after] - pH[before] ). For HCN, Ka = 4.9 e-10.
A. 1.1B. 0.11C. -0.22D. -0.11E. 0.38
2: If 20.0 mL of 0.15 M benzoic acid (a monoprotic acid) is titrated with 30.0 mL of 0.10 M NaOH, calculate the pH of the solution at the equivalence point. For benzoic acid, Ka = 6.3e-5.
A. 5.54B. 2.53C. 11.3D. 8.49E. 7.06
Consider the titration of 100.0 mL of 0.110 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va: Va= 0,2,5,8,10,10.1,11,11.1, and 12 mL Compute Ve, first.
how many grams of acetylene are produced by adding water to 5g of CaC2?
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What is the wavelength of a photon whose frequency is 3.41*10^14 Hz? been told the correct asnwer is 880 nm however I don't know how to even start this problem
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A solution is prepared by dissolving 246 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
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How many grams of calcium hydroxide is produced when 3.2 micrograms of CaC2 reacts with 5.1 micrograms of water?
the specific heat of H2O(s) is 2.09 J/g ?C, of H2O (l) is 4.184 J/g ?C, and of H2O (g) is 1.84 J/g ? C. The heat of fusion of water is 334.7 J/g and the heat of vaporization is 2259.4 J/g.
Determine the characteristic wavelengths if an electron are accelerated through an electric potential to a kinetic energy of 18kev.
a) What is the molarity of the acetic acid? b) If the density of the vinegar is 1.006 g/cm3, what is the mass percent of acetic acid in the vinegar.
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