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JIPMER 2019
Exam
JIPMER
Year
2019
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JIPMER 2019 · Chemistry · Some Basic Concepts of Chemistry

If molarity of Cu^ +2 ions is 3 × 10^ -4 express this in ppm

If molarity of Cu+2\mathrm{Cu}^{+2} ions is 3×10−43 \times 10^{-4} express this in ppm

Options

  1. A0.3
  2. B0.2
  3. C0.1
  4. D0.6

Correct answer

A. 0.3

Step-by-step solution

When solute is present in trace quantities, the concentration is expressed in parts per millions (ppm)(\mathrm{ppm}) or μgmL−1\mu \mathrm{gmL}^{-1}. 100 ml of solution =3×10−4Cu2+=3 \times 10^{-4} \mathrm{Cu}^{2+} ions 106ml10^6 \mathrm{ml} of solution =3×10−4100×106=0.3ppm=\frac{3 \times 10^{-4}}{100} \times 10^6=0.3 \mathrm{ppm}
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