Questions from General Chemistry

Q: What minimum requirement is needed to obtain reproducible results with a single

What minimum requirement is needed to obtain reproducible results with a single-beam spectrophotom?

Q: What experimental variables must be controlled to assure reproducible absorbance data?

What experimental variables must be controlled to assure reproducible absorbance data?

Q: What is(are) advantage(s) of the multiple

What is(are) advantage(s) of the multiple standard additions method over the single-point standard addition method?

Q: Describe the characteristics of organic compounds that fluoresce.

Describe the characteristics of organic compounds that fluoresce.

Q: Explain why fluoresence emission often occurs at a longer wavelength than absorption

Explain why fluoresence emission often occurs at a longer wavelength than absorption.

Q: Describe the components of a filter fluorometer and a spectrofluorometer.

Describe the components of a filter fluorometer and a spectrofluorometer.

Q: Why are phosphorescence lifetimes much longer than fluorescence lifetimes?

Why are phosphorescence lifetimes much longer than fluorescence lifetimes?

Q: Why are fluorometers often more useful than spectrofluorometers for quantitative analysis?

Why are fluorometers often more useful than spectrofluorometers for quantitative analysis?

Q: Use the shorthand notation to describe a cell consisting of a saturated

Use the shorthand notation to describe a cell consisting of a saturated calomel reference electrode and a silver indicator electrode for the measurement of (a) pI. (b) pCl. (c) pPO4. (d) pCN.

Q: The reduced form of nicotinamide adenine dinucleotide (NADH) is an

The reduced form of nicotinamide adenine dinucleotide (NADH) is an important and highly fluorescent coenzyme. It has an absorption maximum of 340 nm and an emission maximum at 465 nm. Standard solutio...