A 2.5 × 10⁻⁴ M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when… · ABC26PH0666

Subject: Physical Chemistry · Chapter: Chemical Kinetics · Topic: Chemical Kinetics – General · Exam: JAM 2001-2022 · Marks: 2 · Difficulty: Medium

A $2.5 \times 10^{-4}$ M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when measured in a cuvette with a path length of 1.5 cm. The absorbance of $1.5 \times 10^{-3}$ M solution of the same complex recorded in a cuvette with a path length of 0.2 cm is ____.
Answer
SELF-PRACTICE — the source book printed no answer.

Nothing is invented here, so this question has no answer on record.

Explanation
Answer: A = 0.72 — ε = 0.90/(2.5×10⁻⁴ × 1.5) = 2400; A = 2400 × 1.5×10⁻³ × 0.2 = 0.72.

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