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Question- What is the pH of a phosphate buffer when [H2PO4-] = [H2PO4^2-] ? I have the pka for HsPO4- is 7.20. The pka for HCH3O2 is 4.74. The Ka for the system is ka2= 6.3e-8. For H3PO4 the first acidic proton has ka1= 7.2e-3
I know we are supposed to utilized pka and the Henderson-Hasselbach equation
Describe the changes in the sizes of the sodium and chlorine atoms during the following combination reaction. 2Na(s) + Cl2(g) ? 2NaCl(s)
A 680 MW coal fired power plant is 34% efficient at producing electricity. The coal has a heating value of 20,000 kJ/kg, an ash content of 5.5% and a sulfur content of 4.5%. Note: 1 MW = 1000 kW , and 1 kW = 1 kJ/s. a. What is the daily input rate..
sand and iron particles that are similar in size and color are mixed together in a beaker. what would be the best
Any number of green plants can photosynthesize glucose (C6H12O6) from carbon dioxide and water, producing oxygen as the remaining product. in an experiment in a biochemistry lab, 500 ml of oxygen was produced in such experiment.
Why is the number of microseconds in a week NOT considered an exact number? Aren't there 10^6 microseconds in a second, 3600 seconds in an hour, 24 hours in a day, and 7 days in a week?
Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 °C. What would the pressure be if the can were heated to 1155 °C?
Based on polarity, which compound do you expect to have a larger Rf value in a soluvent of medum polarity
Standard Electrode Potential (E), a) Write the equation for the cell reaction and indicate cathode and anode half-cells for the electrochemical cell formed from Mg/Mg2+ half-cell and In/In3+ half-cell.
NH2, is neutralized by a KOH solution. A 25.70 mL of KOH was added to the solution and 3.40 mL of HCl was used to back titrate the solution. In the ratio determination of 23.10 mL, HCl was used to completely neutralize 20.00 mL of KOH. Find the no..
Calculate the percent relative error for the three solutions if perfect technique is used. Report the two new molarities. (The error in a 10-mL transfer pipet is 0.02, and the error in the 200-mL volumetric flask is 0.1)
Solid calcium oxide mixes with carbon dioxide gas. Diphosphorus pentoxide is added to water. Hydrogen sulfide gas is bubbled through a solution of silver nitrate.
Which of the following peptides has a pI close to 5.5? Assume that the pKa value of the alpha-amino group is 9.6 and the pKa for the alpha-carboxylate group is 2.3. A. Ser-His-Arg-Asn
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