Ans - AAS and AES
Atomic Absorption Spectroscopy determined the Zn and Cu
Atomic absorption spectroscopy and atomic emission spectroscopy is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation by free atoms in the gaseous state. Atomic absorption spectroscopy is based on absorption of light by free metallic ions.
choose th correct answer Zn and Cu determined by a)UV b)IR. c) AAS&AES
Question (3) a) Match A &B in C AAS& UV) AAS & AES NaCl cu AES
Question (3) a) Match A &B in C AAS& UV) AAS & AES NaCl cu AES
Choose the correct Nernst equation for the cell Zn + Cu2+ à Zn2+ + Cu E = E° - 0.0296 log(Cu / Zn) E=E° - 0.059 log([Zn2+] / [Cu2+]) E = E° - 0.0296 log(Zn / Cu) E = E° - 0.0296 log([Zn2+] / [Cu2+]) E = E° - 0.0296 log([Cu2+] / [Zn2+]) 20 points
Folder# Grade 1. In the voltaic cell shown below, the electrons flow from Zn(s)|Zn²+ (aq)|| Cu" (aq)|Cu(s) Cu(s) (a) Cu(s) ® Zn(s) (b) Zn(s) (c) Zn(s) ® cu (d) Cut ® Zn(s) 2. Which of the following statements about the voltaic cell shown below is correct? Zn(s)[Zn** (aq)|| Cu** (aq) Cu(s) (a) Oxidation takes place at the cathode and reduction takes place at the anode. (b) Oxidation takes place at both the cathode and the anode. (c) Reduction takes place...
1. For the Cu-Zn phase diagram. For a 68 wt% Zn-32 wt% Cu alloy, list the phases and compositions that exist at 1000 °C, 760 °C, 600 °C and 400 °C. 2. For the Cu-Ag phase diagram, answer the following. Label the figure and add is part of your answer sheet.. .....(11 points) a) What is the eutectic temperature and composition? (1 point) b) In the context of this diagram, what does the symbol ß represent? (1 point) Composition (at%...
- Zn2+ Choose... Choose... (1pts) Identify the complete redox reaction for a ZnZn2+1|Cu2+1Cu cell. A. Zn(s) + Cu?+ (aq) (aq) + Cu(s) B. Zn(s) + Cu(s) → Zn2+ (aq) + Cu2+ (aq) C. Zn2+ (aq) + Cu(s) Zn(s) + Cu2+ (aq) D. Zn (s) + 2 Cu(s) — Zn2+ (aq) + 2 Cu2+ (aq) (1pts) Identify the complete redox reaction for a Zn/Zn2+||Pb2+1Pb cell. A. Zn (s) + Pb(s) Zn2+ (aq) + Pb2+ (aq) B. Zn2+ (aq) + Pb(s) Zn(s)...
Which of the following is true
for reaction Cu + ZnCl2 —> CuCl2 + Zn ? Write the oxidation
numbers of each species above their formula and write a
half-reaction showing what happens to both the Cu and Zn2+. Please
show work, I want to learn how to do this!
Which of the following is true for reaction Cu + ZnCl2 - numbers of each species above their formula, and write a half-reaction showing what happens to CuCl2 + Zn?...
12) Which of the following is true for reaction Cu + ZnCl2 --> CuCl2 + Zn ? Write the oxidation numbers of each species above their formula, and write a half-reaction showing what happens to both the Cu and the Zn2+ A) Cu is oxidized B) Zn+2 is reduced C) Cu is a reducing agent D) All of the above statements are correct.
4. Which of the following statements about the voltaic cell shown below is correct? Zn(s)[Zn** (aq)|| Cu** (aq)|Cu(s) (a) The oxidation half-reaction is clearly Zn(s) ® Zn** (aq) + 2 e. (b) The oxidation half-reaction is clearly Zn() Zn" (aq) +le. (C) The oxidation half-reaction could not be anything other than Cu(s) ® Cu (aq) +2 e. (d) It is obvious that the oxidation half-reaction is Zn(s) ® Cu(s). 5. Which of the following statements about the voltaic cell shown...
answer plz
Question 32 (3 points) (32) For a galvanic cell notation: (-) Zn /Zn2+ (aq) // Cu2+ (aq) / Cu (+), which of the following is fully correct? (a) Zn2+ is oxidized to Zn, and Cu2+ (aq) is reduced to Cu. (b) Zn is oxidized to Zn2+, and Cu2+ (aq) is reduced to Cu. 0 (c) Zn2+ is reduced to Zn, and Cu2+ (aq) is oxidized to Cu. (d) Zn is reduced to Zn2+, and Cu (aq) is reduced...
2. Fill in the missing reagent, product or catalyst. H2, Pd/C A. excess) CH2l2, Zn(Cu) B. ether HIO4 C. H20, THF 2) NaHSO3