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Anachem > Lesson 2 > Flashcards

Lesson 2 Flashcards

1
Q

General steps for chemical analysis that answers the question “what information is needed”

A

Identify the problem

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2
Q

Step that answers the question “what material is required for analysis

A

Select the sample

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3
Q

Step that answers “how the sample prepared”

A

Prepare the sample

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4
Q

Step that answers “how desired the data obtained”

A

Conduct the analysis

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5
Q

What are the general steps for chemical analysis

A
  1. Identify the problem
  2. Select the sample
  3. Prepare the sample
  4. Conduct the analysis
  5. Analyze the data
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6
Q

Determines the presence or absence of a particular compound, but not the mass or concentration

A

Qualitative analysis

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7
Q

Test to detect starch

A

Iodine test

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8
Q

Qualitative chemical or metallurgical assay which uses acid

A

Acid test

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9
Q

Test that detect carbohydrates

A

Molisch test

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10
Q

Test for detecting the presence of amino acids

A

Ninhydrin test

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11
Q

Test for detecting the presence of peptide bonds

A

Biuret test

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12
Q

Test to detect iodine

A

Starch test

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13
Q

A presumptive blood test in which the chemical indicator phenolphthalein is used to detect the possible presence of hemoglobin

A

Kastle meyer test

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14
Q

Measurement of the quantities of particular chemical constituents present in a substance

A

Quantitative analysis

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15
Q

A chemical substance is measured by determining the volume or amount of a well defined reagent that is needed to react with this analyte
eg. Acid base titrate

A

Volumetric analysis/ titration

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16
Q

Involves determining the amount of material present by weighing the sample beyand or after some transformation

A

Gravimetric analysis

17
Q

An analytical procedure usued to detect the presence of certain elements, primarily metal ions, based on each elements characteristics emission spectrum.

A

Flame test

18
Q

the principle behind volumetric analysis is that the mass of an ion in a pure compound can be determined and then used to find the mass percent of the same ion in a known quantity of an impure compound. True or false?

A

False, it should be gravimetric analysis

19
Q

Common steps followed in gravimetric analysis

A
  1. Preparation of a solution containing a known weight of the sample
  2. Separation of the desired constituent
  3. Weighing the isolated constituent
  4. Computation of the amount of the particular constituent in the sample from the observed weight of the isolated substance.
20
Q

A feild of analytical chemistry that investigates analytes using scientific instruments.

A

Instrumental methods

21
Q

Measures the interaction of the molecules with electromagnetic radiation

A

Spectroscopy

22
Q

Measures mass to charge ratio of molecules using electric and magnetic fields

A

Mass spectrometry

23
Q

What are the sequence of observation in mass spectrometry?

A
  1. Ionization
  2. Acceleration
  3. Deflection
  4. Detection
24
Q

•Makes use of the production or consumption of electrons by chemicals
•measure the potential (volts) and or current(amps) in an electrochemical cell containing the analyte

A

Electrochemical analysis

25
Q

4 categories of electrochemical analysis

A
  1. Potentiometry
  2. Coulometry
  3. Amperometry
  4. Voltammetry
26
Q

Category of electrochemical analysis that transferred charge is measure over time

A

Coulometry

27
Q

Category of electrochemical analysis that the difference in electrode potentials is measured

A

Potentiometry

28
Q

Category of electrochemical analysis that the cell’s current is measured over time

A

Amperometry

29
Q

Category of electrochemical analysis that the cell’s current is measured while actively altering the cell’s potential

A

Voltammetry

30
Q

The properties of materials are studied as they change with temperature

A

Thermal analysis

31
Q

Process of measuring the amount of heat released or absorbed during a chemical reaction

A

Calorimetry

32
Q

An analytical technique used to determine a materials thermal stability and it’s fraction of volatile components by monitoring the weight change that occurs as a sample is hrated at a constant rate.

A

Thermogravimetric analysis (TGA)

33
Q

An approach used to remove one type of chemical from another.

A

Separation method

34
Q

Separation of mixture

A

Chromatography

35
Q

Is a method used to separate charged particles from one another

A

Electrophoresis

36
Q

General categories of analytical techniques

A

•classical methods
•instrumental methods

Anachem (3 decks)

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