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Complete the titration of a weak diprotic solid acid. You take 178.0 mg of the solid acid as well as dissolve it in about 50mL of distilled water. You titrate with 0.095 M NaOH as well as arrive at an endpoint at 25.20mL. You know that at the final pH both protons have been titrated. Explain what is the formula weight of the acid? Define at what volumes would you find out the pKa's of this diprotic acid?
Calculate the standard free energy change, and determine whether or not the following reaction is spontaneous under standard conditions:
The equilibrium constant for a reaction 2SO2 + O2 2SO3 is 2.8 x 10^2 at a certain temperature. If [ SO2 ]^2 = 0.0124M and [ O2 ] = 0.031M, what is [SO2]
If the temperature in the chamber is 103 °C after the charge is ignited, what is the pressure, in atmospheres, behind the cannonball when the gunpowder goes off?
What is the equilibrium constant, Kc, for the reaction at this temperature?
In an automobile engine, at the end of the upstroke the piston is at its maximum height in a cylinder of exact dimensions. At this time, a precisely measured mixture of fuel and oxidant ignites to form gaseous products.
For each of the following species, draw its Lewis-dot structure. If the species exhibits resonance, draw all the resonance hybrids. For each species, tell its shape, bond angles, hybridization of the central atom, and whether it is polar or nonpola..
Determine an apparent radius of the tungsten (VI) ion assuming the oxide ion radius is 1.40A. Suggest a reason that the calculation might give a result that has no physical significance.
The molecular formula mass of this compound is 240 amu. What are the subscripts in the actual molecular formula
How many grams of dry NH4Cl need to be added to 2.40 L of a 0.300 M solution of ammonia (NH3) to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8e-5
Consider the following compounds and suppose that 0.5M solutions are prepared of each:Nal, NH4Br, KF, KCN, KC2H3O2, CsNO3, and KBr. Write the formulas of those that have solutions that are A) acidic B)basic and C) Neutral
Consider this reaction data, If you were going to graphically determine the activation energy of this reaction, what points would you plot? provide two separate points.
Two concentration measurements, 1 year apart, are made on a sample of this radioactive element. In the later measurement, it is found that 0.07% of the parent atoms present at the time of the first measurement have decayed. Define what is the half..
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