Laboratory Safety Guidelines Quiz
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Questions and Answers

What should you do if a chemical is spilled on you?

  • Report it after class
  • Leave it to dry
  • Wash it off immediately with water (correct)
  • Ignore it

    • It is permissible to eat or drink in the laboratory.

    False

    What type of clothing is required for working in the laboratory?

    Protective clothing, such as a lab coat

    The formula weight of a substance expressed in grams is known as a __________.

    <p>mole</p> Signup and view all the answers

    Match the following actions with their appropriate guidelines:

    <p>Wash spills immediately = Safety procedure after a chemical spill Handle hot equipment with bare hands = Unsafe practice Use a lab coat = Required protective clothing Read chemical labels = To ensure correct reagent use</p> Signup and view all the answers

    Which of the following should NOT be done when working in the lab?

    <p>Use broken glassware</p> Signup and view all the answers

    It is safe to heat or mix substances near your face.

    <p>False</p> Signup and view all the answers

    What should you do if you encounter an unknown chemical?

    <p>Never smell or taste it.</p> Signup and view all the answers

    What is the primary aim of the Faculty of Pharmacy at BAU?

    <p>To provide high-quality pharmacy education and scientific research</p> Signup and view all the answers

    Students are allowed to use chemicals from unlabeled bottles.

    <p>False</p> Signup and view all the answers

    List one main safety rule to follow in the laboratory.

    <p>Dress appropriately for the lab.</p> Signup and view all the answers

    Always read the label written on the ______ bottles before use.

    <p>reagent</p> Signup and view all the answers

    What should you do after finishing your work in the laboratory?

    <p>Clean your place</p> Signup and view all the answers

    Match the following titration types with their descriptions:

    <p>Acid-Base Titration = Neutralization of an acid with a base Back Titration = Determining the concentration of a substance by reacting it with a known excess of reagent Complex Formation Titration = Formation of a complex compound during titration Direct Titration of Bases = Titrating a base directly with a standard solution of an acid</p> Signup and view all the answers

    Chewing gum is allowed in the laboratory.

    <p>False</p> Signup and view all the answers

    In case of excess reagents, they must be ______ instead of being returned to the stock bottle.

    <p>rejected</p> Signup and view all the answers

    What is the primary role of NaCl in the analysis of mixtures of HCl and phosphoric acid?

    <p>To suppress hydrolysis and liberate protons</p> Signup and view all the answers

    H3BO3 is a strong acid that gets ionized completely in a solution.

    <p>False</p> Signup and view all the answers

    What indicator is used to determine the total acidity in the mixture of hydrochloric acid and phosphoric acid?

    <p>Methyl orange</p> Signup and view all the answers

    The reaction of 1 ml of 0.1 N HCl corresponds to __________ grams of Na2B4O7·10 H2O.

    <p>0.01907</p> Signup and view all the answers

    Match the acid with its type:

    <p>HCl = Strong acid H3PO4 = Triprotic acid H3BO3 = Weak acid Na2B4O7·10H2O = Boric acid precursor</p> Signup and view all the answers

    What happens first in the analysis of a mixture of borax and boric acid?

    <p>Titration with standard acid</p> Signup and view all the answers

    The overall reaction of borax in solution may be considered as fully neutralized boric acid.

    <p>False</p> Signup and view all the answers

    What is the purpose of adding glycerol during the titration of boric acid?

    <p>To increase the acidic strength for titration</p> Signup and view all the answers

    What is the first step to determine the total alkalinity of a mixture of Borax and Sodium Carbonate?

    <p>Add known excess of standard acid and boil off CO2</p> Signup and view all the answers

    Barium chloride must be filtered off after precipitating carbonate in Winkler's Method.

    <p>False</p> Signup and view all the answers

    What indicator is used to titrate the hydroxide content in Winkler's Method?

    <p>ph.ph. indicator</p> Signup and view all the answers

    1 ml of 0.1 N NaOH corresponds to _____ grams of NaHCO3.

    <p>0.0084</p> Signup and view all the answers

    Match the following compounds with their corresponding weight in grams for 1 ml of 0.1 N HCl:

    <p>Na2CO3 = 0.0053 gm NaOH = 0.00401 gm</p> Signup and view all the answers

    In the Two Indicators Method, which portion is determined by titrating with standard acid?

    <p>All hydroxide and half carbonate</p> Signup and view all the answers

    Borax content can be determined by back titrating the residual unused acid with a standard alkali hydroxide solution.

    <p>True</p> Signup and view all the answers

    The weight of Borax is calculated using the formula W/V to determine % __________.

    <p>W/V</p> Signup and view all the answers

    What is the purpose of adding the eosin indicator in the determination of KBr?

    <p>To visually indicate the endpoint</p> Signup and view all the answers

    The Fajans method uses a nitric acid solution to determine chloride ions.

    <p>False</p> Signup and view all the answers

    What is used to determine excess silver nitrate in the Volhard method?

    <p>Standard thiocyanate</p> Signup and view all the answers

    1 ml of 0.05N AgNO₃ = ______ g NaCl

    <p>0.002925</p> Signup and view all the answers

    Match the following compounds with their respective calculations:

    <p>NaCl = 0.002925 g in 1 ml N/20 Ag NO₃ KBr = 0.00595 g in 1 ml 0.05N Ag NO₃ KI = 0.0083 g in 1 ml 0.05N Ag NO₃ HCl = Standardized by Volhard method</p> Signup and view all the answers

    Which step is NOT part of the procedure for bromide determination using the Fajans method?

    <p>Titrate with NaOH</p> Signup and view all the answers

    The process for determining iodide using the Fajans method is the same as that for chloride.

    <p>True</p> Signup and view all the answers

    What additional component is added in the procedure for HCl detection using the Volhard method?

    <p>Concentrated nitric acid</p> Signup and view all the answers

    What is the purpose of adding ferric alum in the titration with ammonium thiocyanate?

    <p>To act as an indicator for endpoint detection.</p> Signup and view all the answers

    In the determination of magnesium, the pH of the solution is maintained at 10.

    <p>True</p> Signup and view all the answers

    What is the indicator used in the complexometric titration for magnesium?

    <p>Eriochrome black T</p> Signup and view all the answers

    1 ml M/20 Na2 H2Y = ______ g MgSO4.

    <p>0.0060185</p> Signup and view all the answers

    Match the following ions with their titration method:

    <p>Chloride = Mercurimetric Titration Magnesium = Complexometric Titration Calcium = Complexometric Titration Sodium = Not mentioned</p> Signup and view all the answers

    Which of the following solutions is used to prepare the filter paper after washing the precipitate?

    <p>Distilled water</p> Signup and view all the answers

    The first excess of mercuric ions produces a red color in the supernatant layer.

    <p>False</p> Signup and view all the answers

    To determine the percentage of NaCl, you need to titrate with ______ solution.

    <p>mercuric nitrate</p> Signup and view all the answers

    Study Notes

    Pharmaceutical Analytical Chemistry II Lab Manual (PHAR 270)

    • Course: Pharmaceutical Analytical Chemistry II (PHAR 270)
    • Lab Manual: Fall 2024-2025
    • Mission Statement (Faculty of Pharmacy BAU): The faculty is focused on providing high-quality pharmacy education and conducting scientific research to produce competent pharmacists ready to advance the field nationally and internationally. They emphasize the importance of professional ethics and collaboration with peers and society. Educational tools, qualified staff, and laboratory facilities support this mission.

    Contents

    • Lab policy and General information: Pages 3-4
    • Fundamental Terms in Titrimetric Analysis: Page 6
    • Standardization of Solutions: Page 6
    • Acid-Base titration: Page 6
    • Direct Titration of Bases: Page 20
    • Back Titration: Page 24
    • Back Titration with Blank Determination: Page 31
    • Precipitate: Page 33
    • Complex Formation Titration: Page 35

    Laboratory Regulations

    • General Conduct: Students must bring a notebook, wear a lab coat, turn off cell phones, and read reagent labels before use. Never use chemicals from unlabeled bottles or return excess reagents to stock bottles. Follow procedures carefully and avoid touching hot equipment. All chemicals are hazardous; minimize exposure time. No talking or gum chewing. Keep work areas clean.

    • Consequences for Violations: Violations may result in expulsion, grade deductions, or being marked absent.

    Lab Policy and General Information

    • Safety: Lab safety is paramount. Appropriate attire, such as long pants and tied hair, must be worn.
    • Conduct: Do not eat, drink, or apply cosmetics in the lab. Any incidents of glass breakage or spills require immediate reporting to instructor. Do not perform experiments or procedures not directly assigned.
    • General Safe Work Practices: Be cautious, avoid touching hot objects, handle chemicals safely and dispose properly of used materials. Be aware of the safe use of all lab equipment.

    Important Laboratory Rules & Guidelines

    • Attendance & Participation: Required for a good grade.
    • Assignments: Includes lab reports required for each experiment and presentations of results.
    • Expectations: Students will follow all lab rules.
    • Completing the experiments: Students should follow the schedule. All assigned labs and procedures must be completed accurately to pass the class. Incomplete labs will impact the final grade.

    Additional Topics (Based on the extracted pages)

    • Calculations with Molarity: Includes formulas for mole, molarity, and calculating titrations, example problems for calculations.
    • Various Titration Techniques: (Acid-base, back titration, precipitate formation, etc.)
    • Specific Lab Procedures: Detailed steps for various experiments (e.g., standardization solutions, determinations of different substances) are outlined.
    • Laboratory equipment and devices: Illustrations of various laboratory equipment such as burettes, volumetric flasks, graduated pipettes, and more.

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    Related Documents

    PHAR 270 Pharmaceutical Analytical Chemistry II Lab Manual PDF

    Description

    Test your knowledge on laboratory safety rules and practices with this quiz. Questions cover various laboratory protocols, proper handling of chemicals, and essential safety measures. Make sure to review best practices to keep yourself and others safe in the lab.

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