Which would be the best method for converting A into B? A) H3O+, heat B BH3: THF; then H₂O2, OH C) concd. H₂SO4; then H₂O, heat OH D) Hg(OAc)2/THF-H₂O; then NaBH4,OH E) HBr; then NaOH/H₂O
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- The table below shows the structural formulas and corresponding K, values of four different compounds. Which statement best explains the data? Acid Formula K(25°C) 1.8X 10-5 1.4x 10 Acetic CH3COOH CH2CICOOH CHCI,COOH Chlorkacetic Dichloroacetic 3.3x 10-2 2X 10- Trichloroacetic CCl,COOH A) The chlorine atoms draw electrons away from the O-H bond. B) The chlorine atoms push electrons toward the 0-H bond. C) The chlorine atoms successively increase the molar mass of the compounds. D) The chlorine atoms successively increase the number of electrons of the compounds.Complete the balanced chemical equation for the following reaction between a weak acid and a strong base. CH:NH:CI(aq) + NaOH(aq) 4- 2+ | ]3+ 1 3 4 6 7 8 D4 15 Do ) (s) (1) (g) (aq) Na H C CI Reset • x H2O Delete 1L 2. +18). The formulas and the structures of two acids are shown below. Which acid is a stronger acid? If the acid strength of the two acids is equal, say so. Cl2CHCOOH CH3COOH но но CI-C-C-OH н-с-с-он ČI Ką = 0.0324 Ką = 1.82 x 10-5 %3D a. Cl¿CHCOOH is a stronger acid than CH;COOH. b. CH;COOH is a stronger acid than CI½CHCOOH c. The two have equal acid strength. d. none of the above
- Given the following: [H3O+] = 5.112 x 10-13, please calculate the pOH.(Note please use 3 sig. figs for your answer.)Does the equilibrium lie to the left or to the right in the following reaction: H3CO: + H-Br: 2 H;CO-H + H,CO-H + Br:1. For the reaction: 2NH3(g) + CO2(g) (NH2)2CO(s) + H2O(g) AH = - 330 kJ Predict how each of the following changes would impact a reaction that is currently at equilibrium. That is, which way would the reaction progress in order to respond to the change in the system to regain equilibrium (use arrows to show the direction of change that would occur to return back to equilibrium). Explain your reasoning for each part.
- Complete the balanced molecular reaction for the following weak base with a strong acid: Na CIO2(aq) + H2SO«(aq) – 4- |2+ 3+ 04+ 1 4 6. 7 8 9 Do (s) (1) (g) (aq) Na CI S H H2O OH Reset x H2O Delete 1L LOFinal Volume V₂ = 341 mL al Volume V₁ =? 10. What is the molecular geometry and molecular polarity for CH₂Cl, and SO, ²? 11. What do catalysts do and how do they affect reaction rates? 12. 2 Atoms are side by side. Their chemical reactivity is dependent on the electrons which hold serve fe 13. Identify the acid, base, conj. Acid, conj. Base: H₂CO, + HPO4 H₂PO4 + HCO, 14. True or False? Chemistry looks at the microscopic view of matter. 15. Identify the 4 biological buffer mechanisms 16. Calculate the density of silver metal if 930 cm³ block has a mass of 2.21 x 104 g. Express the answer with the correct number of significant figures. 17. Kinetic molecular theory describes the behavior of which state of matter? 18. The pH scale operates on a logarithm scale which means an increase or decrease fold in the of pH is by 10s. So, a change in pH from 5 to 3 is a hydrogen ion concentration. And in other words, a pH of 3 has and less OH- than a pH of 5 19. A precipitate occurs in the reaction…What is the appropriate expression for the given reaction? a. Ka b. Kb c. Ksp d. Kf e. Kw f. Kp 1. NiCO3(s) ↔ Ni+2(aq) + CO3-2(aq) 2. Hg+2 + Excess I- ↔ HgI4-2 3. H2O(l)↔ H+(aq) + OH-(aq)
- What is the K₂ reaction of HCN? K₁ reaction: The K₂ of HCN is 6.2 × 10-10. What is the K, value for CN at 25 °C? Кь = Given that K, for HCIO is 4.0 x 108 at 25 °C, what is the value of K, for CIO™ at 25 °C? Kb = Given that K for (CH₂)¸N is 6.3 × 10-5 at 25 °C, what is the value of K, for (CH₂)2NH' at 25 °C? K₁ =Complete the balanced molecular reaction for the following weak base with a strong acid: Na CIO(aq) + H:SO:(aq) – 4 2+ |3+ 4+ 1 3 4 6 7 8 D4 15 Do ) (s) (1) (g) (aq) H2O S H Na CI H3O+ OH- Reset • x H2O Delete 1L 2. +The value of Ka for phenol (a weak acid) , C,H5OH , is 1.00×10-10. Write the equation for the reaction that goes with this equilibrium constant. (Use H30* instead of H*.) + +