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Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-) . Ka= 3 x 10^-7 pH? 0.119 M pyridine (C5H5N) , Kb= 1.7 x 10^-9 pH? Help me please, iam stuck on these problems.
Five structural isomers have the formula C6H14. Where needed, draw the structure and give the IUPAC name of all five isomers
Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.
Barium sulfate is a very insoluble compound. Please give reasons for compounds like barium sulfate or barium phosphate to be insoluble
When the solvent is removed from a sample solution, 3.0 mole of substance B, 7.5 moles of substance C, and 15.0 moles of substance A are left in the solution. What is the mole fraction of substance A in this new solution?
describe and explain the possible effect on your results of the following experimental errors or variations. a) you added only enough 3 M H2SO4 to bring the pH down to 4. b)your reaction mixture had an oily layer on top when you added the 3 M sulf..
Predict whether the entropy change is positive or negative for each of the following reactions. Give reasons for your predictions.
When 24 mL of a 170 mL stock solution containing 1.5 M BaF2 is diluted to 76 mL, what is the concentration of Ba2+ in the new solution
What is the age of the wine in the glass on the left, and the glass on the right? b. What assumption(s) do you have to make in order to compare their tritium counts?
C.A. Yates was given a 50.0mL sample of the weak acid. The known concentration of the weak acid is .25M. After preparing a buret he delivers 25.0mL of the weak acid into a 100mL Erlenmyer flask. He then titrated this solution using a standardized ..
Calculate molar absorbancy of PAP if its diluted solution has an A280 =0.272.The cuvette's width is 1 cm.
How much energy is evolved during the reaction of 32.5 g B2H6 and 72.5 g Cl2? Given: B2H6(g) +6Cl2 (g)---->2BCl3 (g) + 6HCl (g) DH -1396kj
MgNH4PO4*6H20 loses H20 stepwise as it is heated. Between 40 and 60 degrees C the monohydrate is formed, and above 100 degrees C the anhydrous material is formed. What are the phosphorus percentages of the monohydrate and of the anhydrous material..
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