3.3.14.2 Practical Techniques in Organic Chemistry

    Cards (92)

    • Safety goggles in an organic chemistry lab are used to shield eyes from chemical splashes
    • What does MSDS stand for in the context of organic chemistry labs?
      Material Safety Data Sheets
    • Proper adherence to safety protocols in an organic chemistry lab minimizes the risk of accidents.

      True
    • A reflux condenser condenses vapors and returns them to the reaction vessel.
      True
    • What is a rotary evaporator used for in organic chemistry labs?
      Remove solvents under vacuum
    • What is vacuum filtration typically used for in organic chemistry labs?
      Filtering fine precipitates
    • Vacuum filtration is faster than gravity filtration
      True
    • Match the filtration technique with its example:
      Gravity Filtration ↔️ Removing unreacted reactants
      Vacuum Filtration ↔️ Purifying crystal products
    • What are three common recrystallization techniques?
      Simple, multiple, fractional
    • What are three types of personal protective equipment (PPE) used in organic chemistry labs?
      Lab coats, goggles, gloves
    • For chemical spills on skin, rinse thoroughly with water for 15 minutes.
    • A rotary evaporator removes solvents under vacuum
    • In simple recrystallization, the product is dissolved in a hot solvent
    • What is the purpose of extraction in organic chemistry?
      Separate desired compound
    • What equipment is used in vacuum filtration?
      Büchner funnel, vacuum pump
    • Extraction is used to separate insoluble materials from a desired compound

      True
    • Fractional distillation creates multiple stages of condensation and evaporation
    • Fractional distillation uses a fractionating column to create multiple stages of condensation and evaporation.

      True
    • During melting point determination, the temperature range is recorded when the substance starts and completes melting.
      True
    • Material Safety Data Sheets (MSDS) provide information on chemical hazards and safe handling practices.

      True
    • A reflux condenser is used to condense vapors back into the reaction mixture during heating.
    • What is the purpose of lab coats in an organic chemistry lab?
      Protect clothing from spills
    • Steps to follow in case of chemical burns in an organic chemistry lab:
      1️⃣ Cover with a sterile bandage
      2️⃣ Seek medical attention
    • A separatory funnel is used to separate immiscible liquid layers.
    • Match the lab equipment with its purpose:
      Round-bottom Flask ↔️ Contain and heat reaction mixtures
      Separatory Funnel ↔️ Separate immiscible liquid layers
      Reflux Condenser ↔️ Condense vapors and return to vessel
      Distillation Apparatus ↔️ Purify liquids by fractional distillation
    • Match the filtration type with its characteristic:
      Gravity Filtration ↔️ Slower speed
      Vacuum Filtration ↔️ Higher efficiency
    • Filtration is used to separate solids from liquids
    • Vacuum filtration has a higher efficiency
    • Steps in the crystallization process
      1️⃣ Dissolve product in hot solvent
      2️⃣ Cool the solution slowly
      3️⃣ Product crystallizes while impurities remain dissolved
    • Recrystallization solvents should dissolve the target compound when hot but allow it to crystallize out when cooled
      True
    • What document provides information on specific chemical hazards?
      Material Safety Data Sheet (MSDS)
    • A reflux condenser maintains constant volume during heating

      True
    • Crystallization is a purification method used to separate a desired solid product from impurities
    • Steps to achieve optimal crystal formation in recrystallization
      1️⃣ Dissolve product in hot solvent
      2️⃣ Cool the solution slowly
      3️⃣ Filter the crystals
    • Gravity filtration is slower than vacuum filtration but effective for removing large, easily filtered solids
    • Recrystallization involves dissolving the desired compound in a hot solvent
    • What is the purpose of a fractionating column in fractional distillation?
      Improve separation of liquids
    • Distillation is a purification technique used to separate liquids based on their differences in boiling points.
    • To prepare a sample for melting point determination, a small amount of finely ground solid is packed into a capillary tube.
    • Proper ventilation in an organic chemistry lab is ensured by using a fume hood.