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suppose 25.00 mL of 0.100 M HCl is added to an acetate buffer prepared by dissolving 0.100 moles of acetic acid and 0.110 moles of sodium acetate in 500 mL of solution. What are the initial and final pH's? What would be the pH if the same amount of HCl were added to the 125 mL of pure water? The Ka of acetic acid is 1.8*10^-5
What is the titer of the iodine solution of the .1000g sample of pure ascorbic acid 23.52 ml I2.
Steam at 100C is used to heat water. What is the minimum mass of steam required to melt 100g of ice at 0C and heat the resulting liquid to 100C?
2K(s)+2H2O(l)--> 2KOH(aq) + H2(g) A 5.00 g chunk of potassium is dropped into 1.00 kg water at 24 deg C. What is the final temperature of the water after the preceding reaction occur.
Calculate the average formal charge on an oxygen atom in the structure of the phosphate ion that minimizes formal charges, such as demonstrated in Part A.
If you dissolve 4 aspirin tablets in a 340mL glass of water, what is the pH of the solution and the percent dissociation?
The increase in the rate of reaction with temperature is due to A. increase in the number of effective collisions. B. decrease in activation energy.
how efficient is the extraction of tea leaves containing 1.0g of caffeine with two 30mL portions of chloroform over that of a single-step extraction? KD= 8.36 at 25 C)
determine the theoretical yield and the percent yield of ethanol if 684 g of sucrose undergoes fermentation and 349 g of ethanol is obtained
How much heat is required to raise the temperature of 73.5 of water from its melting point to its boiling point?
Calculate the concentrations of all species in a 1.10 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
For the reaction: N2(g) + 2 O2(g) ? 2 NO2(g), Kc = 8.3 × 10-10 at 25°C. What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas.
Calculate the heat released when 1 kg of white phosphorus is allowed to burn in air at a constant pressure of 1 bar.
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