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A 15.6 mL sample of a 0.387 M aqueous hydrocyanic acid solution is titrated with a 0.346 M aqueous barium hydroxide solution. What is the pH at the start of the titration, before any barium hydroxide has been added?
Equilibrium between the composition of Hydrogen sulphide in the gaseous and liquid phases can be represented as Yn=48.3Xn.
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.
An unknown metal weighing 13.11 g at a temperature of 81.0*C is placed in a calorimeter containing 25.0 mL of water at a temperature of 25.0*C. The final equilibrium temperature is 30.0*C. What is the specific heat of the metal?
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
When 50. mL of 0.50 M formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH when half of the formic acid has been neutralized, and at the equivalence point (be sure to account for the change in volume at each step). Select a good ..
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
a fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean. each barrel contains 42 gallons. if the oil film on the ocean is 2.5 x 10^2nm thick , how many square meters will the oil slick cover?
Using the Nernst Equation, calculate the voltage for a concentration cell with: Cu (s)| 0.01 M Cu2+|| 1.0 M Cu2+| Cu (s)
Two gas tanks are linked by a connecting tube of negligible volume with a valve. One contains 15 L of nitrogen at 7.2 atm of pressure. The other contains 8.3 L of helium at 4.1 atm of pressure.
oxalic acid dihydrate (H2 C2 04). 2H20 (formula weight = 126 g/mol) is sometimes used to standardize NaOH solutions. How many grams of this acid will be required to titrate 45.0 mL of 0.18 M NaOH solution
Generation and use of a standard curve and serial dilutions, This lab provided a 100mM Glucose standard solution which you are required to dilute with water to give final concentrations of 0,0.4,0.8,1.2,1.6 and 2.0 mmol/L glucose in a final volume..
When a piece of copper wire is placed in a colorless solution of silver nitrate, the surface of the wire becomes coated with a shiny silvery material, and the copper begins to form aqueous copper(II) nitrate, which is blue. Which of the following ..
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