Why are sodium chloride plates used to run IR spectra of nujol mulls? Tick all t

Question

Why are sodium chloride plates used to run IR spectra of nujol mulls? Tick all that apply. Glass plates are more expensive than NaCl NaCl doesn't absorb in the IR region between 4000 and 650 cm Naci is hygroscopic so reacts with atmospheric moisture giving good spectra even if the sample is not properly dry NaCl is much stronger than glass so the plates don't break so easily QUESTION 3 1 points Save Answ Metals and ligands can be classified as hard and soft. Which of the following statements is true. Choose as many as you like. Fe3+ is a hard metal cul + is a hard metal Ti4+ is a soft metal Pt2+ is a soft metal QUESTION 4 1 points Save Answ Ligands can be classified as hard or soft based on which donor atoms they contain. Hard ligands have very electronegative donor atoms Which of the following statements is true? O Water is a hard ligand Fluoride is a soft ligand PPh3 is a soft ligand Dimethyl sulfide (Me25) is a hard ligand

Explanation / Answer

option B

NaCl absorptions are transparent to most of the IR spectrum; there are absorbtions at 400600cm1, which leaves most of the spectrum transparent. Sodium chloride is chosen because it is transparent to infrared radiation. These plates - called "salt plates" - are rather expensive because each plate is cut from a single giant crystal; they are very fragile and sensitive to moisture, including the moisture in your fingers.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.