Please explain your answer: Of the following, only_forms a useful buffer system. A) 0.3M HCI /...
Can You Please Answer #4 With The Correct Multiple Choice Letter? 4. (2 pts) Which of the following combinations of chemicals could be a buffer? a. HCl/NaCl b. HCI/NaOH c. HC2H302/NaC2H302 e. NaOH/NaC2H302
2) Which one of the following pairs cannot be mixed together to form a buffer solution? A) NaC2H302, HCI (C2H302 = acetate) B) H3PO4, KH2P04 C) NH3, NH4CI D) RbOH, HBr E) KOH, HE
please explain. thanks 6. A buffer composed of TRIS (FW-121.135 g/mol) and TRIS-HCI (FW-157.596 g/mol, pKa 8.072) contains the following forms in solution: он OH NH," NH +H но Но но но (a) Calculate the pH of a buffer prepared by mixing 13.10 g of TRIS and 9.5 g of TRIS-HCI in 1L of solution. (b) Calculate the pH of the solution in Part (a) after 5 mL of 0.5M NaOH is added
1. Show your working out for the following calculation a) TENS buffer: Make from 0.1M NaOH from stock 10M 0.2% SDS from 10% stock 1mM EDTA from 0.5M stock 10mM Tris pH 7.5 from 1M stock How would you make 200ml of TENS buffer from these stock solutions? b) 5M LiCl How would you make 5M LiCl (MW=42.40g/mol)? c) 70% Ethanol How would you make 1L of 70% Ethanol? d) HisTag Protein Purification Solutions Charge Buffer 50mM NiSO4.6H2O Binding...
please answer this correctly!! work would help :) 19. In which of the following are the species listed in order of increasing pH? (K, for HC2H302 is 1.80 x 10-5, and K, for NH4+ is 5.56 x 10-10). A) HNO3, NH4CI, KCI, NaC2H302, KOH B) HNO3, KCI, NH4CI, KOH, NaC2H2O2 C) NH4Cl, HNO3, KCl, KOH, NaC2H4O2 D) KCI, NH4CI, HNO3, KOH, NaC2H302 E) none of these
This is one question, please answer all parts! A buffer solution is 0.40 M NHs and 0.60 M NH4CI Kb for NHs is 1.8x 10 a) Calculate the pH for the buffer system b) Calculate the pH of the solution after adding 0.00600 moles of NaOH to 400.0 mL of the buffer c) Calculate the pH of the solution after adding 0.050 moles of HCl to 600.0 mL of the buffer
21. Which of the following solutions will be the best buffer at a pH of 9.26? (K, for HC2H,02 is 1.8 × 10-5, Kb for NH3 is 1.8 × 10-5.) A) 0.20 M NH3 and 0.20 MNH4Cl B) 3.0 M HC2H3O2 and 3.0 M NH4CI C) 0.20 M HC2H302 and 0.20 M NaC2H302 D) 3.0 M NH3 and 3.0 M NH4CI E) 3.0 M HC2H302 and 3.0 M NH3 PTS: 1 DIF: moderate TOP: 8.2 8.3 ANS: D KEY: general...
6 M HCI solution a. b. 3 M NaOH solution c. Red litmus paper Explain your answer: 5. A water-soluble unknown is found to form a solution with a pH near that of pure water. W hich of the following functional groups is indicated by this information? a. Carboxylic acid d. No answer is correct. Explain your answer: c. Amide b. Amine 6. Which of the following would be useful in helping you identify the functional group indicated in Question...
5. Write an acid-base equation for the following pairs of compounds: a. HF and HCI b. NaOH and NH3 C. HCl and NaOH d. CH3COOH and NH3 e. NH4CI and NH3
True or false? Explain your answer in detail for full credit. The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCl.