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AnaChem LAB > Anachem W1 > Flashcards

Anachem W1 Flashcards

1
Q

Types of Samples

A

Qualitative and Quantitative

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2
Q

Determination of identity of the chemical species.

A

Qualitative

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3
Q

Determination of the relative amount of the chemical species in each sample.

A

Quantitative

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4
Q

Four scales of Operations

A

MACRO ANALYSIS
SEMIMICRO ANALYSIS
MICRO ANALYSIS
ULTRAMICRO ANALYSIS

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5
Q

the object of the analytical procedure (ex. A blood sample)

A

sample

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6
Q

the substance that is of interest in the analysis (ex. Amount of hemoglobin in the blood)

A

Analyte

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7
Q

the constituents, apart from the analyte, of the given sample (ex. All the constituents of blood except hemoglobin)

A

Matrix

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8
Q

Amount of analyte is more than 0.10 grams (100 mg)

A

MACRO ANALYSIS

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9
Q

MACRO ANALYSIS

A

Amount of analyte is more than 0.10 grams (100 mg)

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9
Q

Amount of analyte is between 0.010-0.10 grams.

A

SEMIMICRO ANALYSIS

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10
Q

SEMIMICRO ANALYSIS

A

Amount of analyte is between 0.010-0.10 grams.

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11
Q

Amount of analyte is 10^-4 to 10^-2 grams.

A

MICRO ANALYSIS

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12
Q

MICRO ANALYSIS

A

Amount of analyte is 10^-4 to 10^-2 grams.

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13
Q

Amount of analyte is less than 10^-4 grams. Considered absent.

A

ULTRAMICRO ANALYSIS

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14
Q

ULTRAMICRO ANALYSIS

A

Amount of analyte is less than 10^4 grams. Considered absent.

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15
Q

Considered as absent

A

ULTRAMICRO ANALYSIS

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16
Q

The _______ of reagents has an important bearing on the accuracy attained in any analysis.

A

purity

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17
Q

Confirms to the minimum standards set forth by the Reagent Chemical Committee of the American Chemical Society (ACS).

A

REAGENT GRADE

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18
Q

The highest quality commercially available for this chemical.

A

REAGENT GRADE

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19
Q

Chemicals with extraordinary purity prepared by National Institute of Standards and Technology (NIST).

A

PRIMARY-STANDARD GRADE

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20
Q

a reagent that is very pure
Highest purity

A

PRIMARY-STANDARD GRADE

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21
Q

Chemicals prepared for a particular or specific application.

A

SPECIAL-PURPOSE GRADE

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22
Q

Ex. RTPCR

A

SPECIAL-PURPOSE GRADE

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23
Q

Included among these are solvents for spectrophotometry and high-performance liquid chromatography.

A

SPECIAL-PURPOSE GRADE

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24
Q

Select the best grade of chemical available for analytical work. Whenever possible, pick the _______________ that is sufficient to do the job.

A

smallest bottle

25
Q

Replace the top of every container ___________ after removing reagent. Do not rely on someone else to do it.

A

immediately

26
Q

Hold the stoppers of reagent bottles between your_______. Never set a stopper on a desktop.

A

fingers

27
Q

Never return any excess reagents to a bottle. The money saved by returning excesses is seldom worth the risk of contaminating the entire bottle.

A

True

28
Q

Never insert spatulas, spoons, or knives into a bottle that contains a solid chemical.

A

True

29
Q

Separates ions per group. Key on how we separate ions per group.

A

Precipitating Reagent

30
Q

Chemical that is added to cause the precipitation.

A

Precipitating Reagent

31
Q

Separating ions into groups.

A

Separating Reagent

32
Q

To check if ion is present or absent.

A

Confirmatory Reagent

33
Q

Wash properly apparatuses before using by washing with a ______________

A

liquid detergent

34
Q

Wash it with tap water then several small portions of ____________

A

distilled water

35
Q

________ is usually a waste of time and is always a potential source of contamination.

A

Drying

36
Q

Rinsing with _______ may help for drying and removing grease films.

A

acetone

37
Q

chlorides and nitrates can be evaporated by adding _________

A

sulfuric acid

38
Q

nitrate ion and nitrogen oxides by adding _____

A

urea

39
Q

Ammonium chloride by adding _________

A

conc. Nitric acid

40
Q

Some unwanted substances can be eliminated during ___________.

A

evaporation

41
Q

_____________ is frequently difficult to control because of the tendency of some solutions to overheat locally.

A

Evaporation

42
Q

Organic constituents can frequently be eliminated from a solution by adding ________________ and heating to the appearance of sulfur trioxide fumes

A

sulfuric acid

43
Q

Is the resulting liquid after a mixture of liquid and solid has been left to settle out or centrifuged to separate the two.

A

SUPERNATANT LIQUID

44
Q

You will have two layers solid on the bottom and __________ on the top

A

supernatant

45
Q

Medical term of supernatant liquid

A

Centrifuge

46
Q

To remove the supernatant, carefully _____ or _______ the solution away from the solid.

A

pour or pipette

47
Q

If the solid becomes re-suspended as the supernatant is removed, ___________ the sample again.

A

centrifuge

48
Q

The purpose of washing precipitates is to ensure that all interfering ____ will be washed away from the sample.

A

ions

49
Q

____________ is a device by which a centrifugal force produced by an electric motor speeds up the rate of setting of a precipitate.

A

Centrifuge

50
Q

Centrifugation speed of __ in __ minute duration ALWAYS.

A

speed of 2 in 1 minute

51
Q

Any ________ means there’s still precipitate in that case we centrifugate it again.

A

cloudiness

52
Q

When reading volume in an apparatus, always read at eye level at ______ meniscus.

A

lower

53
Q

Apparatuses used in analytical chemistry for precisely measuring volume

A

Volumetric Pipette
Mohr Pipette
Serological Pipette
Eppendorf Micropipette

54
Q

Pipette that ends with #__ All liquids should be delivered or transferred.

A

9

55
Q

Pipette that ends with #___ Not all liquid should be transferred.

A

10

56
Q

Litmus paper changes from blue to red.

A

Acidic

57
Q

Litmus paper changes from red to blue.

A

Basic

58
Q

This is a technique wherein your solution will smell like ammonia gas.

A

Making solution Ammoniacal

58
Q

A pungent smell will tell that your solution is decidedly _____________.

A

ammoniacal

59
Q

Add one drop more of the reagent. If it is still _______ this means precipitation is not complete. So let it settle again, add one more until no more precipitate will form.

A

cloudy

60
Q

________________ is important so that the remaining ions will not interfere with the analysis of succeeding groups.

A

Complete precipitation

AnaChem LAB (19 decks)

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