All Book titration: [References] A 0.300 M solution of NaClO is prepared by dissolving NaClO in water. A 50.0 mL sample of this solution is titrated with 0.200 M HCI, K for HCIO is 3.5 x 10-8. Calculate the pH of the solution at each of the following points of the a. Prior to the addition of any HCI pH=10.97 b. Halfway to the equivalence point pH=7.46 c. At the equivalence point pH=4.29 d. After 5.00 mL of HCl has been added beyond the equivalence point pH=1.66

A solution of an unknown weak base (0.495 g in 100 mL of water) was prepared and titrated with standardized 0.113 M HCÌi and the pH of the solution was plotted as a function of titrant added (shown below). Titration of a Weak Base With 0.113 M HCI 12 10 10 20 30 40 50 60 70 80 90 Volume of HCl added (ml) Possible identities for the three liquid bases are shown in the table below. Base pyrole pyrimidine pyridine triethylamine 2.51 x 10-14 1.25 x 10-13 1.70 x 10-9 5.30 x 104 Density (g/mL) 0.967 1.02 0.982 0.762 Based on the data above, identify the weak base and explain your selection. The best explanations will account for all relevant experimental data. Additionally, suggest an indicator to use for this titration if it were to be done without a pH meter. Hd

Suppose that 50.00 mL of 0.100 M acetic acid is titrated with 0.100 M NaOH. (Weak Acid - Strong Base Titration) Find the pH if the following volume of NaOH are added. i. 30 mL NaOH ii. 35 mL NaOH iii. 40 mL NaOH iv. 45 mL NaOH v. 50 mL NaOH

-2 A chemistry graduate student is given 100. mL of a 0.80M chlorous acid (HCIO,) solution. Chlorous acid is a weak acid with K,=1.1 × 10 ´. What mass of KCIO, should the student dissolve in the HCIO, solution to turn it into a buffer with pH = 1.37? You may assume that the volume of the solution doesn't change when the KC10, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. x10

A certain indicator, HA, has a K value of 2.0 x 10. The protonated form of the indicator is blue and the ionized form is red. What is the pK, of the indicator? pK = What is the color of this indicator in solution with pH = 3? about us careers privacy policy terms of use contact us help 949 PM XI 风下 3/10/202 edts f12 inse ho 立

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e and le akeCovakiAcivity dolorntor asinnment-take [Review Topics] [References] Use the References to access important values if needed for this question. A buffer solution contains 0.305 M NH,CI and 0.338 M NH3 (ammonia). Determine the pH change when 0.089 mol KOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change = Submit Answer Retry Entire Group 1 more group attempt remaining erevs Next ENG 令 D US Home End Areert & 7 8

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Ka(HOAC) = 1.8 x 10-5. A 1-L buffer solution is prepared by mixing 0.35 mol HOAC and 0.45 mol NaOAc. Which of the following processes will increase the pH of the above buffer solution? O a. add more water b.add more HOA c. add some HCI into the above buffer SO d. add some NH3 into the above buffer e. None of the above

Determine the pH at the point in the titration of 40.0 mL of 0.200 M HNNH2 with 0.100 M HNO: after 10.0 mL of the strong acid has been added. The value of Kb for H2NNH2 is 3.0 x 10-6. PREV 1 2 4 NEXT > Based on your ICE table and definition of Kb, set up the expression for Kb in order to determine the unknown. Do not combine or simplify terms. = 3.0 x 10-6 RESET [0] [0.200] [0.0200] [0.100] [0.140] [0.175] [x] [2x] [0.200 + x] [0.200 - x] [0.0200 + x] [0.0200 - x] [0.100 + x] [0.100 - x] [0.140 + x] [0.140 - x] [0.175 + x] [0.175 - x]