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A compound is a weak acid with a pKa of 7.4. You make 100 mL of a 1.0 M solution of this compound. The pH of the resulting solution is 8.0. Then you add 40 mL of 1.0 M hydrochloric acid (HCl) to the solution. What is the new pH?
A buffer consists of a weak acid and its conjugate base. For the following pairs, indicate which is the acid and which is the base:
if H2 of 50.0 mL and C 2 H 4 of 50.0 mL are permitted to react at the pressure of 1.5 atm, produce C 2 H 6 that has a volume of 50.0 mille litres.. compute the amount of (PV )work done?
A 0.9157g mixtureof CaBr2 and NaBr is dissolved in water and AgNO3 is added to the solution to form AgBr Precipitate. If the mass of the precipitate is 1.6930g, what is the percent by mass of NaBr in the original mixture
The more water molecules, the more intermolecular forces formed, the more energy released when ions dissolve in water. How does the periodic trend of cation radius for the alkali chloride solids compare to the number of water molecules that can fo..
a gas-filled balloon having a volume of 2.50 l at 1.2 atm and 25degc is allowed to rise to the stratosphere about 30 km
Explain why the absolute value of the work done by a process can never be greater than the absolute value of the Helmholtz free energy change.
a solution of ammonia and water contains 1.40times1025 water molecules and 5.30times1024 ammonia molecules. how many
The overall reaction for the corrosion of iron by oxygen is given by the following reaction. 4Fe (s) + 3O2 (g) 2Fe2O3 (s) Compound ?H° (kJ/mol) S° (J/mol K) Fe (s) 0 27 O2 (g) 0 205 Fe2O3 (s) -826 90 Calculate the G° for the reaction at 298K and ..
Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a 25.00 mL aliquot. Titration of the lead required 26.68 mL of the EDTA solution. Determine the com..
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises
the S for the system is predicted to be negative, so therefore the ?S for the surroundings must be positive to a greater extent so that the the net S for the universe is positive
What are the other side products present in this biocatytic reaction? Name the principal enzymes taking part in this bioconversion. To which class of enzymes do they belong to?
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