Understanding Dilution Factors and Reagents in Clinical Labs

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What type of dilution involves transferring a specified amount of mixture from one tube to the next in a series of tubes?

Triple dilutions

Serial dilutions (correct)

Simple dilutions

Double dilutions

Which grade of chemicals is considered best for lab use?

Commercial grade

Industrial grade

Technical grade

Analytic reagent grade (AR) (correct)

What organization certifies standard reference materials used in clinical chemistry?

Food and Drug Administration (FDA)

World Health Organization (WHO)

American Chemical Society (ACS)

National Institute of Standards and Technology (NIST) (correct)

What type of water is most commonly used as a reagent in laboratories?

Reagent grade water Signup and view all the answers

What does the label on a reagent indicate?

Grade and impurity percentage Signup and view all the answers

What is the dilution factor if a sample is diluted 1:10?

$1/10$ Signup and view all the answers

What is the term for a substance dissolved in a liquid?

Solute Signup and view all the answers

Which method of water purification involves the removal of ions to produce reagent-grade water?

Reverse osmosis Signup and view all the answers

What are buffers in a solution primarily responsible for?

Maintaining pH stability Signup and view all the answers

Which term refers to the measure of how well electricity passes through a solution?

Conductivity Signup and view all the answers

What is the inverse logarithm of hydrogen ion concentration in a solution called?

pH Signup and view all the answers

Which clinical laboratory supply requires calibration for accuracy?

Thermometers Signup and view all the answers

What is the purpose of a tamper-proof seal in specimen identification?

To verify the identity of the specimen at each phase Signup and view all the answers

In the Système International d’Unités (SI), what defines a physical quantity or dimension?

Basic units Signup and view all the answers

Which unit is commonly used to express concentration as moles per liter?

Liter Signup and view all the answers

What is the main purpose of a dilution factor in scientific experiments?

To decrease the concentration of a solution Signup and view all the answers

When performing a serial dilution, what happens to the dilution factor as you progress through each step?

It decreases by a factor of 10 each time Signup and view all the answers

What does a concentration expressed in 'percent solution: w/w' indicate?

The weight of solute per weight of solution Signup and view all the answers