Answered: 24. A 20.0 ml aliquot of a 0.515 M…

24. A 20.0 ml aliquot of a 0.515 M aqueous solution is added to 125 ml of pure water. What is the concentration (in M) of the new sołution? A: 0.0710

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter17: Spontaneity, Entropy, And Free Energy

Section: Chapter Questions

Problem 125CP: Consider a weak acid, HX. If a 0.10-M solution of HX has a pH of 5.83 at 25C. what is G for the...

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Consider a weak acid, HX. If a 0.10-M solution of HX has a pH of 5.83 at 25C. what is G for the acids dissociation reaction at 25C?
5:23 O13%DE elearning.yu.edu.jo/m O A student was given 2 beakers labeled with numbers 1 and 2, each beaker contains a clear solution. Additionally, he was given two reagent bottles labeled with A and B. Now, he added reagent A to both beakers and he noticed the formation of a precipitate in beaker 2 but not in beaker 1. However, the addition of reagent B to both beakers resulted in the formation of a precipitate in beaker 1 but not in beaker 2. Based on the information, which of the following is correct? a. compound A is the limiting reactant in beaker 1. b. compound B is the limiting reactant in beaker 2. c. compound A is the limiting reactant in beaker 2. d. compound B will be the excess reactant in beaker 1. Question 2
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The solubility of an unknown salt, M2X3, at 25°C is 4.47 x 10-5 mol/L in water. a) Calculate the value of Ksp for M2X3 at 25°C? 1.78e-22 b) A solution was prepared by mixing 75.0 mL of 7.84 x 10-5 M M(NO3)3 (aq) and 95.0 mL of 1.26 x 10-4 M Na2X (aq). What is the reaction quotient Q? [ Select ] Will the precipitate form in the above solution? [ Select ]
dihydrate 4. H₂C2O4.2H2O(s) is a primary standard substance. 2.3688 g of oxalic acid c concentration of the NaOH solution. Hint: You must write a balanced equation for the were completely neutralized by 42.56 ml of NaOH solution. Calculate the molar Setup:
app.101edu.co Question 16 of 25 A 185.0 mL sample of 1.200 M Pb(NO3), is mixed with 139.50 mL of 1.500 M NaCl, and the PbCl, precipitate is filtered from the solution. Then 200.0 mL of 3.000 M NaBr is added to the remaining solution, and the PbBr2 precipitate is also collected and dried. What is the mass (in grams) of the PbBr2 precipitate, assuming the yield in each precipitation step is 100%? 1 3 6. 8. 6. +/- 2. LO
Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H,O,(aq) is mixed with 100 mL of 0.10 M NaC,H3O,(aq) 6. A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. Species Ka HBr(aq) >>I (very large) HC,H;O,(aq) 1.8 x 10-5 a. Using the information above, write the letters of the solutions in the boxes below to rank the solutions in order of increasing pH. Explain your reasoning for the ranking Lowest pH Highest pH b. Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. c. The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes…
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What weight of potassium hydrogen phthalate will require 30. mL of a 0.30M NaOH solution to reach the equivalence point? KHP MM 204.22 g/mol .CO;K' .CO;K' NaOH + H2O + *CO,H COƠ,Na'
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50.0mL of 0.100M HCl solution and 50.00mL of 0.100M AgNO3 solution, both initially at 22.54 degrees C, are mixed in a styrofoam cup. A white precipitate forms via reaction (I) below, and the mixture's temperature rises to 23.35 degrees C. Calculate the deltaH (in kJ/mol) for reaction (I). You may assume that the reaction mixture is 100.0 g and that the specific heat is 4.184 J/g degrees C. (I) Ag+ (aq) + Cl- (aq) --> AgCl (s)