MIDTERM GEN CHEM

• What is the course code for the class taught by Engr. Grace De Castro?


  SCI 401
• What are the main topics covered in Unit 1 of SCI 401?


  • Introduction
  • Laboratory safety
  • Waste management
• What should you do before using chemicals in the laboratory?


  Check the name on the chemical
• Why should you never return unused chemicals to the reagent container?


  To prevent contamination of the original chemical
• How should you dispose of waste in the laboratory?


  Dispose waste properly
• What should you do with broken glass in the laboratory?


  Pick it up and dispose of it properly
• What is the purpose of the eye wash fountain?


  To wash chemicals off the eyes
• What is the function of the safety shower in the laboratory?


  For rinsing chemicals off the body
• What does MSDS stand for?


  Material Safety Data Sheet
• Why is it important to use a fume hood during experiments?


  To protect against inhaling hazardous fumes
• What should you do if a mercury thermometer breaks?


  Follow laboratory instructions and restrict access until cleanup
• What are some common organic solvents mentioned in the study material?


  • Acetone
  • Ethanol
  • Toluene
  • Diethyl Ether
  • Chloroform
  • Dichloromethane
  • Acetonitrile
  • Dimethyl Sulfoxide (DMSO)
• What are some common inorganic solvents mentioned in the study material?


  • Water
  • Liquid Ammonia
  • Liquid Sulfur Dioxide
  • Liquid Nitrogen
  • Hydrogen Peroxide
  • Sulfuric Acid
  • Carbon Dioxide (Supercritical)
• What are the common laboratory glassware used in all chemistry courses?

  1. Graduated cylinders
  2. Wash bottle
  3. Erlenmeyer flask
  4. Beaker
  5. Funnel
  6. Test tubes
  7. Pipettes
  8. Watch glasses
• What glassware is commonly used in organic chemistry for conducting reactions and purification?


  1. Cork ring
  2. Fractionating column
  3. West condenser
  4. Separatory funnel
  5. Round bottom flask
  6. Claisen adapter
  7. Three-way adapter
  8. Vacuum adapter
  9. Thermometer adapter

  10. Plastic clip (Keck clip)

  11. Rubber fitting for thermometer adapter
• What tools are used in all chemistry courses?

  1. Crucible tongs
  2. Test tube holder
  3. Striker
  4. Forceps
  5. Spatula
  6. Scoopula
  7. Glass stirring rod
  8. Porcelain pestle
  9. Dropper pipet
• What are some tools used in organic chemistry labs?

  1. Evaporating dish
  2. TLC chamber
  3. Buchner funnel
  4. Hirsch funnel
  5. Rubber sleeves for funnels
  6. Clay tile
  7. Vials for storage
  8. 60° bars and ring stand
  9. Drying tube
• What is the definition of measurement?


  • The process of quantitatively determining the size, extent, quantity, or degree of a particular attribute or property.
  • Involves comparing the property being measured to a standard unit.
  • Represents and communicates information about various aspects of the chemical/physical world.
• Why are accurate measurements important in science?


  • Foundation of scientific research.
  • Allow data collection, relationship establishment, and hypothesis testing.
  • Critical for scientific discoveries and advancements.
• How are accurate measurements important in engineering?


  • Essential for designing and manufacturing products.
  • Ensure functionality and meet safety, performance, and reliability standards.
• Why are accurate measurements crucial in construction?


  • Vital for ensuring structures are built correctly and safely.
  • Mistakes can lead to structural failures and compromise integrity.
• How are accurate measurements significant in medicine?


  • Critical for diagnosing conditions and prescribing medications.
  • Essential for monitoring patient health and making informed medical decisions.
• Why are accurate measurements important in technology?


  • Reliant on precise measurements for development.
  • Variations affect performance and reliability of electronic components.
• How are accurate measurements used in environmental monitoring?


  • Crucial for tracking environmental changes.
  • Help understand and address environmental issues.
• Why are accurate measurements fundamental in commerce?


  • Ensure fair transactions and consistent exchange of goods and services.
• What are the various types of measurement mentioned?

  1. Length
  2. Mass
  3. Time
  4. Temperature
  5. Electric Current
  6. Amount of Substance
  7. Luminous Intensity
• What are fundamental units?


  • Basic building blocks of a system of units.
  • Independent of other units and cannot be expressed in terms of any other units.
• What are the fundamental units in the International System of Units (SI)?


  1. Meter (m)
  2. Kilogram (kg)
  3. Second (s)
  4. Ampere (A)
  5. Kelvin (K)
  6. Candela (cd)
  7. Mole (mol)
• How is the meter defined in the SI system?


  • Defined as the distance that light travels in vacuum in 1/299,792,458 of a second.
• How is the kilogram defined in the SI system?


  • Currently defined by a physical prototype, with efforts to redefine it in terms of fundamental constants.
• How is the second defined in the SI system?


  • Defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium 133 atom.
• How is the ampere defined in the SI system?


  • Defined as the constant current that produces a force of exactly $2 \times 10^{-7}$ newton per meter of length between two parallel conductors one meter apart in a vacuum.
• How is the kelvin defined in the SI system?


  • Defined based on the triple point of water, where water coexists in three phases at a specific temperature and pressure.
• How is the candela defined in the SI system?


  • Defined in terms of the luminous intensity of a specified light source.
• How is the mole defined in the SI system?


  • Defined as the amount of substance that contains $6.022 \times 10^{23}$ elementary entities.
• What is the relationship between volume and length in chemistry?


  • Volume is derived from length.
  • 1 L = 1 dm³ = 1000 cm³ = 1000 mL.
• What are derived units?


  • Formed by combining fundamental units to represent other quantities.
  • Used to measure different physical quantities.
• What is the unit of force in derived units?

  Newton (N)
• What is the unit of energy in derived units?


  Joule (J)
• What is the unit of power in derived units?


  Watt (W)