AALSO Field Guide Test 2 Questions and
Answers Verified 100% Correct
A(n) ___ calibration is useful when performing spectrophotometry with samples that exhibit
high degrees of matrix interference.
standard additions
A calibration curve for a spectrophotometer is usually determined by ___.
running chemical standards that bracket the expected range of the samples
Colorimeters are often also referred to as photometers. (True/False)
True
Colorimeters are similar to spectrophotometers, but they have ___.
limited wavelengths at which they can operate
Electrodes are typically designed to test multiple parameters. (True/False)
False
It is possible to combine multiple electrodes into a single apparatus to allow testing multiple
parameters, but these are typically more ___, more ___, and have a greater likelihood of ___.
expensive; difficult to troubleshoot; failure
The three components of a device used for potentiometry are a(n) ___, a(n) ___, and a(n) ___
indicator electrode; reference electrode; potential measuring device
Temperature can be measured using a(n) ___ or a(n) ___.
probe; liquid-filled thermometers
Mercury-filled thermometers should be avoided, despite being more accurate, as mercury is
toxic. (True/False)
, True
ATC (which stands for ___) probes account for ___ caused by ___. These are commonly
used with ___.
automatic temperature compensation; drift in potentiometric measurements;
temperature differences; pH electrodes
The "p" in pH has no known origin but is modernly referred to as the ___ or ___ of
hydrogen in a solution.
power; potential
pH can be mathematically expressed as the ___ and runs from ___ to ___.
inverse logarithm of the hydrogen activity in a compound; 0; 14
At the low end of the pH spectrum are strong acids whose hydrogen activity is very ___.
At the high end are bases whose hydrogen activity is very ___.
high; low
Acids when mixed with water will form ___ ions. Bases will ___ the level of these ions.
hydronium; reduce
Deionized water tends to be slightly basic. (True/False)
False; slightly acidic
pH measurements are typically ___ calibrated using a set of pH buffers, with pH 4 being
___, pH 7 being ___, and pH 10 being ___.
directly; pink; yellow; blue
Electrodes are the only way to measure pH. (True/False)
False; chemical substances with known pH reactions, such as litmus or phenolphthalein, can be
used
Answers Verified 100% Correct
A(n) ___ calibration is useful when performing spectrophotometry with samples that exhibit
high degrees of matrix interference.
standard additions
A calibration curve for a spectrophotometer is usually determined by ___.
running chemical standards that bracket the expected range of the samples
Colorimeters are often also referred to as photometers. (True/False)
True
Colorimeters are similar to spectrophotometers, but they have ___.
limited wavelengths at which they can operate
Electrodes are typically designed to test multiple parameters. (True/False)
False
It is possible to combine multiple electrodes into a single apparatus to allow testing multiple
parameters, but these are typically more ___, more ___, and have a greater likelihood of ___.
expensive; difficult to troubleshoot; failure
The three components of a device used for potentiometry are a(n) ___, a(n) ___, and a(n) ___
indicator electrode; reference electrode; potential measuring device
Temperature can be measured using a(n) ___ or a(n) ___.
probe; liquid-filled thermometers
Mercury-filled thermometers should be avoided, despite being more accurate, as mercury is
toxic. (True/False)
, True
ATC (which stands for ___) probes account for ___ caused by ___. These are commonly
used with ___.
automatic temperature compensation; drift in potentiometric measurements;
temperature differences; pH electrodes
The "p" in pH has no known origin but is modernly referred to as the ___ or ___ of
hydrogen in a solution.
power; potential
pH can be mathematically expressed as the ___ and runs from ___ to ___.
inverse logarithm of the hydrogen activity in a compound; 0; 14
At the low end of the pH spectrum are strong acids whose hydrogen activity is very ___.
At the high end are bases whose hydrogen activity is very ___.
high; low
Acids when mixed with water will form ___ ions. Bases will ___ the level of these ions.
hydronium; reduce
Deionized water tends to be slightly basic. (True/False)
False; slightly acidic
pH measurements are typically ___ calibrated using a set of pH buffers, with pH 4 being
___, pH 7 being ___, and pH 10 being ___.
directly; pink; yellow; blue
Electrodes are the only way to measure pH. (True/False)
False; chemical substances with known pH reactions, such as litmus or phenolphthalein, can be
used
