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In each of two flasks, a solution is prepared by placing 0.25 moles acetic acid (CH3COOH) and 0.25 moles acetate ions (CH3COO-) in sufficient water to prepare 1.00L of solution.
A.) Added to the solution in one flask, 0.15 moles KHSO4 (s). Describe the effect of this on [CH3COOH] and [CH3COO-] (their concentrations). Account for your answer in terms of number of moles of protons transferred. Also, has the capacity of the buffer been exceeded? Explain.
B.) Added to the solution in the other flask is 0.40 moles NaOH (s). Describe the effect of this on [CH3COOH] and [CH3COO-]. Account for your answer in terms of number of moles of protons transferred. Also, has the capacity of the buffer been exceeded? Explain.
which of the following processes are exothermic?
The enthalpy change when a strong acid is neutralized by strong base is -56.1 kJ/mol. If 12.0 mL of 6.00 M HBr at 21.30°C is mixed with 300. mL of 0.250 M NaOH
A sample containing 2.20 moles of neon gas has a volume of 8.00 L. Assume that the pressure and the temperature remain constant. What is the new volume of gas in liters when a sample of 70.0 g neon is added to the neon gas already in the container..
Radio waves are very low energy forms of electrmagnetic radiation. What is the energy of a mole of radio wave photons with a
1.50 g of nh3 react with 2.75g of o2 which is the limiting reactant? How many grams of excess remain after the limiting reactant is completely consumed?
Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced from the reaction of 2.94g Na2CO3 with excess HCL
A sample that weighs 0.1586 grams contains only sodium chloride and potassium chloride was dissolved in water. It took 22.90 mL of 0.1000 AgNO3 to precipitate all of the chloride present.
When strontium bromide (SrBr2) is heated in a stream of chlorine gas, it is completely converted to strontium chloride
A gas occupying a volume of 395 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
individual suffering from a high cholesterol level in her blood has 239 of cholesterol per 100 of blood. If the total blood volume of the individual is 5.4 , how many grams of total blood cholesterol does the individual's body contain?
A student takes 195. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Calculate the dilution factor for all 7 test test tubes. Show all work/calculations. 0.1 ml of the solution from the serial dilution 10^-4, 10^-5 and 10^-6 was pipetted onto three separate agar plates.
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