What instrument is used in chemistry labs to measure the molarity of a coloured solution by measuring the light transmitted through it?
Correct answer: C. Spectrophotometer
- A. Electronic gravimetric balance
- B. pH meter
- C. Spectrophotometer
- D. Computer assisted probes
- E. Galvanometer
Explanation
Option c, "Spectrophotometer," is correct because it is the instrument used in chemistry labs to measure the molarity of a colored solution by quantifying the amount of light transmitted through it. Spectrophotometers work on the principle that different substances absorb light at specific wavelengths, which allows for the determination of concentration based on the amount of light absorbed. One of the new technological additions to chemistry labs is the spectron 20 (a spectrophotometer) that uses the absorption of light waves to do qualitative and quantitative investigations in the lab.
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About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
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