инструм англ

21問 • 1年前

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問題一覧

To identify a drug by means of thin-layer chromatography the following parameter is used:

Choose the pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

Electrode made according to the scheme Red, Ox, H+ | Pt belongs to the following type:

Complex redox electrode

In the process of conductometric titration of HCl and CH3COOH acids mixture 0,1 M solution of NaOH is used to measure:

Electrical conduction in solution

Gas chromatography has been used for ethanol quantitative determination. What parameter is measured?

Chromatographic peak height or area

Select a pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

What solution can be determined by photocolorimetric method by selfabsorbance?

Potassium chromate

What substance in a solution can be determined in two ways - by the polarimetric or refractometric method?

Ascorbic acid

An analytical chemist determines sodium cations by ion-exchange chromatography. In order to prepare the cation-exchange resin in the H+ form, the analyst uses:

HCI

Choose a pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

Drugs are commonly analyzed by means of potentiometric pH measurement. Which of the electrodes can be used for measuring the solution pH?

Glass

For the quantitative analysis of ethanol the gas chromatography was used. Which parameter was measured?

Peak height or area

The polarographic method is commonly used for the analysis of inorganic cations and anions. Electroreduction of the analyzed ions is performed by using:

Dropping mercury electrode

Potentiometric method of pH determination is regarded as the most universal and enters into the National Pharmacopeia of Ukraine. Which electrode is used as a reference electrode?

Saturated calomel

During thin-layer chromatography of novocaine, the developed plate represented a stain 3 cm away from the start line, and the length of solvent front was 10 cm. What is the Rf value of novocaine?

0,3

What electrode is used as indicator during dichromatometric determination of F eSO4 in a solution provided that fi- xation of the equivalence point is done by a potentiometric method?

Platinum

During study of pharmaceutical substances pH rate can be determined by method of potentiometry. What electrode can be used as an indicator during measuring of pH solution?

Glass

During quantitative estimation of glucose by polarimetric method the following factor is measured:

Angle of rotation of polarized beam plane

Choose a pair of electrodes for F eSO4 determination by method of potentiometric titration:

Platinum and chlorosilver

Coulometry is based upon measurement of electrics that is spent on electrode reaction. What law underlies coulometric method?

Faraday law

For dichromatometric determination of F eSO4 content in the solution with potentiometric fixation of equivalence point the following indicator electrode is applied:

Platinum

тести бх

тести бх

патфиз7

патфиз7

пат шлунок

пат шлунок

жовтяниця

жовтяниця

бх

бх

патфиоа

патфиоа

нервова сист

нервова сист

нерв сист 2

нерв сист 2

чина

чина

испит патф

испит патф

частина 2

частина 2

3 часть

3 часть

аналит инстум укр

аналит инстум укр

кількісний

кількісний

ох

ох

ох 2

ох 2

4 блят

4 блят

крок

крок

7 м витамины

7 м витамины

1 модуль

1 модуль

2 модуль

2 модуль

новая хуйня

новая хуйня

новпя хуйня 2

новпя хуйня 2

1 модуль

1 модуль

問題一覧

To identify a drug by means of thin-layer chromatography the following parameter is used:

Choose the pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

Electrode made according to the scheme Red, Ox, H+ | Pt belongs to the following type:

Complex redox electrode

In the process of conductometric titration of HCl and CH3COOH acids mixture 0,1 M solution of NaOH is used to measure:

Electrical conduction in solution

Gas chromatography has been used for ethanol quantitative determination. What parameter is measured?

Chromatographic peak height or area

Select a pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

What solution can be determined by photocolorimetric method by selfabsorbance?

Potassium chromate

What substance in a solution can be determined in two ways - by the polarimetric or refractometric method?

Ascorbic acid

An analytical chemist determines sodium cations by ion-exchange chromatography. In order to prepare the cation-exchange resin in the H+ form, the analyst uses:

HCI

Choose a pair of electrodes for potentiometric pH measurement of a solution:

Glass and silver chloride

Drugs are commonly analyzed by means of potentiometric pH measurement. Which of the electrodes can be used for measuring the solution pH?

Glass

For the quantitative analysis of ethanol the gas chromatography was used. Which parameter was measured?

Peak height or area

The polarographic method is commonly used for the analysis of inorganic cations and anions. Electroreduction of the analyzed ions is performed by using:

Dropping mercury electrode

Potentiometric method of pH determination is regarded as the most universal and enters into the National Pharmacopeia of Ukraine. Which electrode is used as a reference electrode?

Saturated calomel

During thin-layer chromatography of novocaine, the developed plate represented a stain 3 cm away from the start line, and the length of solvent front was 10 cm. What is the Rf value of novocaine?

0,3

What electrode is used as indicator during dichromatometric determination of F eSO4 in a solution provided that fi- xation of the equivalence point is done by a potentiometric method?

Platinum

During study of pharmaceutical substances pH rate can be determined by method of potentiometry. What electrode can be used as an indicator during measuring of pH solution?

Glass

During quantitative estimation of glucose by polarimetric method the following factor is measured:

Angle of rotation of polarized beam plane

Choose a pair of electrodes for F eSO4 determination by method of potentiometric titration:

Platinum and chlorosilver

Coulometry is based upon measurement of electrics that is spent on electrode reaction. What law underlies coulometric method?

Faraday law

For dichromatometric determination of F eSO4 content in the solution with potentiometric fixation of equivalence point the following indicator electrode is applied:

Platinum