Praxis 5435 Exam with Complete Solutions
Volumetric Flask Correct answer-used for making liquid solutions of precise volumes,
bulb shaped with narrow tube
Erlenmeyer flask Correct answer-Used for mixing, transporting, and reacting
Burette Correct answer-a graduated glass tube with a tap at one...
Praxis 5435 Exam with Complete Solutions
Volumetric Flask Correct answer-used for making liquid solutions of precise volumes,
bulb shaped with narrow tube
Erlenmeyer flask Correct answer-Used for mixing, transporting, and reacting
Burette Correct answer-a graduated glass tube with a tap at one end, for delivering
known volumes of a liquid, especially in titrations.
Titration Correct answer-a measured amount of a solution of unknown concentration is
added to a known volume of a second solution until the reaction between them is just complete
Determines endpoint of a reaction
light microscope Correct answer-aka optical, microscope that uses a beam of light
passing through one or more (compound) lenses to magnify an object
Digital microscope Correct answer-A type of Microscope that use a camera and a monitor
to allow viewing the sample.
scanning electron microscope Correct answer-a microscope that produces an enlarged,
three-dimensional image of an object by using a beam of electrons rather than light
, Praxis 5435 Exam with Complete Solutions
Graticule slide Correct answer-It is marked with a grid line and is useful only for counting
or estimating a quantity.
Chromatography Correct answer-A technique that is used to separate the components of
a mixture
Analyte Correct answer-substance analyzed or tested, generally by means of laboratory
methods
How to dilute acid Correct answer-Add concentrated acid solution to the water. Put 2/3
total volume of water in grad. cyl. Add acid. Add water to desired volume.
Centrifugate Correct answer-liquid component of solution (clear, not the precipitate),
after being separated in centrifuge.
In blood, blood cells settle and plasma stays on top.
Spectrophotometry Correct answer-Measures how visible light is abosrbed by a colored
solution
Electrophoresis Correct answer-Separation of particles based on electrical charge
Deka- Correct answer-10 (10^1)
, Praxis 5435 Exam with Complete Solutions
Kilo- Correct answer-1000 (10^3)
1000 m in km
Hecto- Correct answer-100
Mega- Correct answer-10^6 (million)
Giga- Correct answer-10^9 (billion)
Tera- Correct answer-10^12 (trillion)
Peta- Correct answer-10^15
Deci- Correct answer-10^-1
Centi- Correct answer-10^-2
Milli- Correct answer-10^-3
, Praxis 5435 Exam with Complete Solutions
Micro- Correct answer-10^-6
Nano- Correct answer-10^-9
Pico Correct answer-10^-12
femto- Correct answer-10^-15
Ampere Correct answer-unit of electric current
Candela Correct answer-luminous intensity
Mole Correct answer-the SI base unit used to measure the amount of a substance
Avogadro's number Correct answer-number of representative particles in a mole, 6.02 X
10^23
significant figures Correct answer-1. Non-zeros
2. Zeros between non-zeros
3. Trailing zeros after non-zeros *if* a decimal is present
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