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Question 1: HA is a weak acid. Its ionization constant, Ka, is 4.9 x 10-13. Calculate the pH of an aqueous solution where the initial concentration of NaA is 0.049 M.
Question 2: 0.131 mol of a weak acid, HA, is placed in enough water to produce 1.00 L of solution. The final pH of this solution is 1.22. Calculate the ionization constant, Ka, of HA.
Question 3: 0.683 mol of a weak acid, HA, and 12.4 g of NaOH are placed in enough water to produce 1.00 L of solution. The final pH of this solution is 4.50. Calculate the ionization constant, Ka, of HA.
a when 120 mg of naphthalene c10h8s was burned in a bomb calorimeter the temperature rose by 3.05 k. calculate the
If you have 300.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture. Use 1.00 g/mL as the density of water.
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV = ?26.434 kJ/g. When a 2.088 g sample of C6H5COOH..
Be sure to calculate what volume of each 0.50M solution should be mixed to give a total volume of 50.0mL and the reactants in the correct stoichiometry.
An apparataus has three bulbs, a,b, and c. a has h2o, co2, and n2 with a pressure of 564 mmHg, Bulbs b and c are empty. bulb a is 25 degrees celcius, b is -70 celcius and c is -190 celcius. how many moles of h2o are in the system if the stopcock b..
A 2.446 g sample thought to contain only one volatile substance, MgCO3, was heated in a nitrogen atmosphere for 30 minutes. After cooling
a fuel gas containing methane and ethane is burned with air infurnace producing a stack gas at 300c and 105kpaabsolute.
The test tube contained some water (besides the metal) that was subsequently added to the calorimeter. Considering a higher specific heat for water, will the temperature change in the calorimeter be higher, lower, or unaffected by this technique e..
(Calculate using the given masses.) lighter isotope amu heavier isotope amu (c) Determine the average molecular mass of a Br2 molecule. amu (d) Determine the average atomic mass of a bromine atom. amu (e) Calculate the abundances of the two isotop..
Calculate the Kc moles of pure SO3 (g) are introduced into an 8.00dm3 container at 1105k. At equilibrium,, 0.58 mol of O2(g) has been formed.for the reaction: 2SO3(g) 2SO2(g) + O2(g)
When 24 copper pennies are submerged in water, the pennies displace 8.26 cm3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper?
using a gas sample of an ideal gas of .95 mol 3.00 atm and at 300 k expands from sixteen litres to twenty eight litres
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