STARRED ANACHEM QUESTIONS

TRUE OR FALSE.

For pipettes marked with **To Deliver (TD)**, a small amount of liquid remaining on the tip should not be blown out.

True

In the determination of chlorides using argentometric titration, what indicator shall be used?

A. Phenolphthalein

B. Ferroin

C. Methyl red

D. Potassium chromate

D.

It is a hazardous waste characteristic which applies to materials that are normally unstable or explosive. They can cause explosions, toxic fumes, gases or vapors when mixed with water.

A. Ignitability

B. Reactivity

C. Corrosivity

D. Toxicity

B.

It is a hazardous waste characteristic which applies to waste liquids with a flash point less than 140°F or solids capable of spontaneous combustion under normal temperature and pressure.

A. Ignitability

B. Reactivity

C. Corrosivity

D. Toxicity

A.

Series of analytical measurements used to assess the quality of the analytical data.

a. Quality Assurance

b. Quality Control

c. Analytical run

d. Fortification

B.

To prepare a 1L of 1000 ppm solution of calcium chloride, how many grams of calcium chloride dihydrate should be weighed?

(Calcium= 40.08 g/mole, Chlorine= 35.35 g/mole, Hydrogen= 1.008 g/mole, Oxygen= 16.00 g/mole)

a. 1.000 gram

b. 1.1098 grams

c. 1.6130 grams

d. 1.5130 grams

C.

Detects contamination from reagents, sample handling, and the entire measurement process.

a. method blank

b. solvent blank

c. calibration blank

d. matched-matrix blank

A.

Sample preparation method in which electromechanically driven rod or vibrating base is used to break particles down mechanically into smaller units; can be performed in wet or dry state.

a. sieving

b. mincing

c. homogenizing

d. pulverizing

D.

This chemical is usually used to disinfect waste containing microbial organisms.

a. chlorine

b. sodium chloride

c. sodium sulfate

d. fluorine

A.

At constant temperature and pressure, the rate of diffusion of a gas varies:

a. inversely as its density

b. directly as its molecular mass

c. directly as the square root of its density

d. inversely as the square of its molecular mass

D.

The volume of a certain gas sample is 235 ml when collected over water at a temperature of 250 C and a pressure of 698 mm Hg. What will be the volume of this gas when measured dry at standard conditions? The vapor pressure of water at this temperature is 23.8 mm Hg.

a. 197 ml

b. 191 ml

c. 223 ml

d. 265 ml

B.

Which of the following represents the largest gas pressure?

a. 1.0 atm

b. 1.0 Pa

c. 1.00 mm Hg

d. 1.0 KPa

A.

The maximum amount of solute that will dissolve in a definite amount of solvent to produce a stable system at a specified temperature is called:

a. dilution

b. solubility

c. saturation

d. concentration

B.

The excess pressure required to stop the flow and keep the solution in equilibrium with the pure solvent is:

a. partial pressure

b. vapor pressure

c. osmotic pressure

d. atmospheric pressure

C.

A 0.217 g sample of HgO (molar mass = 217 g) reacts with excess iodide ions according to the reaction. Titration of the resulting solution requires how many mL of 0.10 M HCl to reach the equivalence point?

HgO + 4 I− + H2O →HgI4 2- + 2 OH−

a. 1.0 mL

b. 10 mL

c. 20 mL

d. 50 mL

C.

The separation of a mixture of substances into pure components on the basis of their differing solubilities is:

a. fractional distillation

b. vacuum crystallization

c. vacuum distillation

d. fractional crystallization

D.

Weighing to constant weight means a weighing difference of _____ using a calibrated analytical balance:

a. ±1.0 mg

b. ±0.01 g

c. ±0.01 mg

d. ±0.1 mg

D.

At 510 nm, the iron o-phenanthroline complex has a molar absorptivity of 1.2 x 10^4. What is the concentration of iron (in ppm) in a solution which gives an absorbance of 0.002 in a 1.00-cm path length cell?

a. 7.3 x 10-3 ppm

b.8.3 x 10-3 ppm

c. 9.3 x 10-3 ppm

d. 6.3x 10-3 ppm

C.

___________ are beliefs and attitudes we have that can actually conflict with our ethical decision.

A. Morals

B. Principles

C. Virtues

D. Values

D.

Sections of the SDS regulated by OSHA.

A. 16

B. 12

C. 11

D. 4

B.

Which of the following statements is true of the pictograms on HCS labels?

A. Pictograms on HCS labels are identical to those used on DOT transport labels and may have various background colors.

B. Consist of four bars that are color-coded as blue, red, yellow, and white to match hazard.

C. HCS pictograms are required and standardized red square-on-points with black hazard symbols and white backgrounds.

D. All of the Above

C.

The type of toxicity cause by long-term exposure:

A. Acute

B. Chronic

C. Local

D. Systemic

B.

An organic compound the production of which was banned in the US in 1979 due to its environmental toxicity and classified as persistent organic pollutant.

A. PAH

B. Dioxin

C. PCB

D. Benzene

A.

Referring to the periodic table, which, of the set of elements has the highest ionization energy: S, Al, Br, Se

A. Se

B. Br

C. S

D. Al

B.

Systematic errors primarily influence a measurement's _________.

A. Accuracy

B. Precision

C. Standard deviation

D. Mean

A.

An error that is known to have occurred but was unavoidable.

A. Bias

B. Random error

C. Gross error

D. Systematic error

A.

Refers to the repeatability of a measurement.

A. Accuracy

B. Precision

C. Specificity

D. Mean

B.

An acid that turns paper towel black, a very dense syrupy liquid that gets especially hot when mixed with water is:

A. Sulfuric Acid

B. Nitric Acid

C. Hydrochloric Acid

D. Perchloric Acid

A.

Which sampling term is incorrectly defined?

A. laboratory sample - smaller, homogeneous sample taken from the bulk and has the same composition as the bulk

B. lot - the total material from which samples are taken

C. aliquot - small portions of the bulk sample taken for individual analysis

D. sample preparation - the series of steps that convert a representative bulk sample into a form suitable for analysis

C.

The liquid solution containing the analyte is passed through a cartridge containing a solid sorbent.

A. Liquid-liquid extraction

B. solid phase extraction

C. purge-and-trap

D. none of the above

B.

Choose the sample that would be best dissolved by HNO3.

A. NaCl

B. Iron ore

C. Copper metal

D. Aluminum Oxide

C.

From the following list, choose those samples that would be best dissolved by HCl.

A. NaCl

B. Iron ore

C. Gold metal

D. Aluminum Oxide

B.

Chemicals of sufficiently high quality to be suitable for use in some syntheses. Organic chemicals of this grade may contain small amounts of intermediates, isomers, or homologs.

A. USP or NF grade

B. HPLC grade

C. Technical Grade

D. Practical grade

D.

When an open bottle of _________________ sits next to an open bottle of ammonium hydroxide, thick white fumes form.

A. Nitric acid

B. Hydrochloric acid

C. Sulfuric acid

D. Hydroflouric acid

B.

____________________ diffuses through skin and is especially bad when it gets under the fingernails.

A. Nitric acid

B. Hydrochloric acid

C. Sulfuric acid

D. Hydrofluoric acid

D.

The onset of a phase transition in a small region which can be the formation of a bubble or of a crystal from a liquid.

A. precipitation

B. nucleation

C. reprecipitation

D. crystallization

B.

This is an example of a loss through volatilization (evaporation) under temperature conditions at which water would volatilize.

A. loss on drying

B. loss on ignition

C. loss on filtration

D. none of the above

The highest apparent analyte concentration expected to be found when replicates of a blank sample containing no analyte are tested.

A. Limit of Detection

B. Limit of Blank

C. Limit of Linearity

D. Limit of Quantitation

B.

A comparison of measuring equipment against a standard instrument of higher accuracy to detect, correlate, adjust, rectify and document the accuracy of the instrument being compared.

A. Verification

B. Validation

C. Calibration

D. none of the above

C.

A method used to purify individual chemical compounds from mixtures of compounds. It is often used for preparative applications on scales from micrograms up to kilograms.

A. column chromatography

B. paper chromatography

C. Flourescence spectrometry

D. AAS

A.

The visual output of the chromatograph. In the case of an optimal separation, different peaks or patterns correspond to different components of the separated mixture.

A. computer display

B. chromatography

C. chromatogram

D. read out

C.

The liquid or gas entering a chromatographic bed (e.g. a column) used to effect a separation by "elution."

A. eluate

B. stationary phase

C. buffers

D. none of the above

A.

Which is NOT an acceptable name for Hg2Cl2?

A. Mercury (II) chloride

B. Mercury (I) chloride

C. Mercurous chloride

D. Dimercury dichloride

A.

Which procedure produces a 0.2 M solution of Na2SO4?

A. Dissolving 0.2 M solid Na2SO4 in 500 mL water.

B. Diluting 400 mL of 0.3 M Na2SO4 to a final volume of 1.0 L.

C. Mixing 500 mL of 0.4 M NaOH with 500 mL of 0.2 M Na2SO4.

D. Mixing 300 mL of 1.2 M NaOH with 600 mL of 0.3 M Na2SO4.

D.