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Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions (1i) Pro-Lys-Phe-Asp (1ii) His-Tyr-Arg-Trp
25 mL of 0.10 M HCl is mixed with 25 mL of .43 M NH3. What is the resulting pH?
you have dissolved 0.298 g of soda ash into 80 mL of deionized water. It took 19.8 mL of 0.0998 M HCl to titrate the solution to the second equivalence point. What is the percent Na2CO3 in the soda ash?
calculate the volume in ml of .500 M HA , .5ooM NaA , and water required to make 250 ml of a buffer with a total concentration
Would a buffer containing HF and F- in appreciable quantity be expected to have a pH of around 3,5,7 or 9? Justify your answer.
If a random sample of this element collected from the tail of a comet has an weighted average atomic mass of 10.788 amu, what is the percent abundance of the lower-mass isotope?
How many mL of each solution should be diluted to 500 mL to make 0.100 M reagent?
For a given sample of {rm CH_3OH}, the enthalpy change on reaction is 19.0 kJ. How many grams of hydrogen gas are produced?
a pencil 7.5 inches long.if there are 2.54cm in an inch,how long is this pencil in decimeters?10dm=1m
how many grams of HNO3 must be dissolved to make 25L of a solution that has a pH of 1.5
What is the difference between a constitutional isomer and a geometric isomer.
How many grams of NaNO2 form when 429 g NaNO3 react? The yield is 90.%.
For each of the following, calculate the concentration of Tris, Tris-H+ and the pH of the solution in each of the following solutions.
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