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For the diprotic weak acid H2A, Ka1= 3.6 x 10^-5 and Ka^2 = 8.5 x 10^-7 What is the pH of a 0.0700 M solution of H2A? What are the equilibrium conecntrations of H2A and A^2- in this solution? pH = ? [H2A} = ? [A^2-] = ?
Solutions of chymotrypsin prepared for experimental purposes are stored in a dilute solution of hydrochloric acid as a "preservative." Explain.
What is the pH of this solution? (Include activity coefficients in your calculation.) What is the fraction of dissociation of butanoic acid in this solution?
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0 C, the volume of the gas is 307 mL. To what temperature must the gas be heated
How many valence electrons are there in a Cr atom, Which of the following 1M solutions will have the highest concentration of ions
What volume of 0.250 M Na3PO4 is required to precipitate all the lead(II) ions from 180.0 mL of 0.550 M Pb(NO3)2
How many grams of sodium formate, NaCHO2, must be added to 750.0mL of .250 M of formic acid, HCHO2, to obtain a buffer with pH of 5.5
The bottle is then brought outside and stored at 0.0°C. (a) What mass of liquid water condenses inside the bottle?
A cube of metal has a mass of 0.321 kg and measures 3.05 cm on a side. Calculate the density and identify the metal.
A living organism has an activity of 15.2 counts per minute (cpm) per gram of carbon. If a bone is determined to have an activity of 3.80 cpm per gram of carbon, how old is the bone?
If the solution has a specific heat capacity of 3.95 J/(g K) and a density of 1.015 g/ml, what is the DeltaH for the following reaction in kJ?
Draw the Lewis structure for the PO4-3 ion, indicating any resonance forms. On the basis of electron configurations, predict the formula of the Type I ionic compound formed from the elements Z=49 and Z=51.
Devise tests which allow you to distinguish between the ions in each case.
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