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WorksheetsDRK2341 QUIZ
Total questions: 10
Worksheet time: 10mins
Which of the following UV-Vis Spectrophotometer experiment’s objectives is NOT TRUE?
To determine the absorbance of solutions at different concentrations.
To determine the concentration of given chemical samples.
To measure the wavelength of CuSO4
What is the name of the unique vessel used for being filled with both blank and sample solutions during analysis using a UV-Vis spectrometer
Disposable glass pipettes
10-mm path-length quartz cell
small test tube
Can unknown concentration solutions be determined if the known concentration solutions are not prepared and analyzed?
YES, it can
NO, it cannot.
Which of the following is NOT an example of UV-Vis Spectrophotometer applications?
Detection of Impurities
Physiological samples: malignant cells, bones, hairs
Structure elucidation of organic compounds
Solutions of transition metal ions that can be colored
What happens to the pH reading when the HCl solution is diluted?
Increase
Decrease
Not change
To prevent the solution inside the probe from leaking and evaporating, the probe should be stored in a solution of _________?
NaCl Solution
Distilled water
Buffer PH 7.00
Potassium chloride solution
What solution CA is made of?
The combination of NaSO4 solution with impurities from tap water
The combination of NaSO4 solution with NaCl powder
Tab water
Methods used to measure pH levels are...?
litmus paper tests
indicators dyes
PH electrodes or PH Meter
All
The dilution factor is given by M1V1 = M2V2, what is M1?
Known concentration
Desired concentration
is given by formula (purity x density x 100) / Molar Mass
All are correct
which of the following is FALSE about UV Vis Spectrophotometer?
UV-Vis Spectrophotometer is a fast, simple, and inexpensive instrument to determine the concentration of an analyte in a solution
Analyte: the compound to be analyzed or identified.
Spectroscopy is the study of how materials react to the irradiated energy
UV-Vis is the short term for “Ultraviolet-visible” light / radiated energy
