Calculate the pH at the halfway point and at the equivalence point for each of the following titrations. a. 100.0 mL of 0.50 M HC7H5O₂ (K₁ = 6.4 × 10-5) titrated by 0.10 M NaOH pH at the halfway point = pH at the equivalence point = b. 100.0 mL of 0.50 M C₂H5NH₂ (K₁ = 5.6 × 10-4) titrated by 0.60 M HNO3 pH at the halfway point = pH at the equivalence point c. 100.0 mL of 0.60 M HCl titrated by 0.15 M NaOH pH at the halfway point pH at the equivalence point

[RCOOH], M [R’OH], M [HA], M Initial Rate, M-min 23. 0.35 0.35 0.50 4.60 0.62 0.35 0.50 8.14 0.35 0.81 0.50 10.6 0.35 0.50 0.75 9.84 Rate = k[RCOOH][R'OH] Rate = k[RCOOH][R'OH][HA] Rate = k[RCOOR']/{[RCOOH][R'OH]} Rate = k[R'OH] Rate = k[RCOOH] 26. The initial reaction rate for the reaction in question 23 can be followed spectrophotometrically by quenching the reaction and determining the amount of R'OH left by its reaction with the dichromate ion, Cr20-2-. Write a balanced equation for the reaction of Cr20,2- with R'OH in acid solution. For simplicity, you may assume R' is an ethyl group (CH3CH2) and the products of the reaction are Cr3+ and CH3COOH. ЗСНЗСН20Н() + 2Cr2072-(аq) + 16H+{аq) + 3СНЗСООН() 4C13+(aq) + 3CH3COOCH3(I) + 14H2O(1) --> 3CH3CH2OH(I) + 2Cr2072-(aq) + 16H+(aq) ЗСНЗСООН() + 11Н20() 4Cr3+(aq)+ + --> --> 4CR3+(aq)++ 3CH3CH2OH(I) + 2Cr2072-(aq) + 5H2O(I) ЗСНЗСООН() + 160H-(аq) CH3CH2OH(I) + Cr2072-(aq) 2Cr3+(aq)+ + CH3COOH(I) --> СНЗCН2ОH() + Cr2072-(aq) Cr3+(aq)+ +…

I-(aq) + OCI-(aq) 10-(aq) + Cl-(aq) The above reaction was studied (at a particular temperature) and the following data were obtained: [1-10 [OCI-]0 Initial Rate (mol/L) (mol/L) (mol L-1s-1) 0.360 0.100 8.42\times 10-20.045 0.100 1.05\times 10-20.090 0.200 4.21\times 10-20.180 0.200 8.42\times 10-2 Which of the following expressions for the rate law are completely consistent with the above experimental data, d[Cl-]/dt = kl OCI-][-] d[10-]/dt = k[OCI-]3 k[OCI][I] = d[OCI-]/dt-d[-]/dt = k[-]2[OC]d[1]/dt = k[-][OC] 1 pts Tries 0/5 Calculate the rate constant (k). (Units required.)

Below you will find twelve (12) reaction products (labeled product 1, product 2, etc.), but you will only find five (5) reaction schemes. Your job is to match the reaction scheme with the correct product. Simply fill in the blank with the product number (i.e. 1, 2, 3, etc.). Then, answer any additional questions regarding the reaction scheme(s). Br OH x OMe Product 2 Product 3 Product 4 CH3 x Product 6 Product 10 x Product 1 CO₂H Product 5 Product 7 OMe Product 11 Product 12 Product 9 1. Mgº (metal) a. 2. CO₂ (s) HBr H₂O₂ 3. H3O+ i. What is the regiochemistry of the first reaction? ii. What is the name of the first step of the second reaction? (Hint: he won the 1912 Nobel Prize for this reaction). OMe Br Product 8 CO₂H Br