1.1.3 Analysis

• Spectroscopy measures the interaction of matter with electromagnetic radiation to identify and quantify chemical compounds
• What does mass spectrometry determine about ions?

  Mass-to-charge ratio
• Match the analytical technique with its description:

  Spectroscopy ↔️ Interaction with electromagnetic radiation

  Chromatography ↔️ Separates components of a mixture

  Mass Spectrometry ↔️ Determines the mass-to-charge ratio

  Titration ↔️ Measures the volume required for reaction
• The endpoint in titration is typically indicated by a change in color or other property.


  True
• What type of indicator is commonly used in redox titration?

  Potassium permanganate
• The equation to calculate the concentration of an unknown solution in titration is C_\text{unknown} = \frac{C_\text{titrant} \times V_\text{titrant}}{V_\text{unknown}}</latex>, where C is the concentration and V is the volume
• In acid-base titration, the endpoint is typically indicated by a pH indicator.
• Complexometric titration uses a metallic ion indicator such as Eriochrome Black T.
• Mastering titration is essential for determining the composition of chemical substances.


  True
• What does spectroscopy measure the interaction of matter with?

  Electromagnetic radiation
• IR spectroscopy is used to identify functional groups and molecular structure.
• Analyzing spectroscopic data is crucial for identifying the composition of a sample.

  True
• Match the analytical technique with its application:

  Spectroscopy ↔️ Identifying chemical compounds

  Chromatography ↔️ Purifying complex samples

  Mass Spectrometry ↔️ Determining mass-to-charge ratio

  Titration ↔️ Measuring solution concentrations
• The endpoint indicator in acid-base titration is a pH indicator.
• What is the formula used to calculate the concentration of an unknown solution in a titration?

  $C_\text{unknown} =$$\frac{C_\text{titrant} \times V_\text{titrant}}{V_\text{unknown}}$
• Spectroscopy is an analytical technique that measures the interaction of matter with electromagnetic radiation
• UV-Vis spectroscopy is used to quantify the concentration of colored compounds.


  True
• Match the spectroscopic technique with its application:

  UV-Vis Spectroscopy ↔️ Quantifying colored compounds

  IR Spectroscopy ↔️ Identifying functional groups

  NMR Spectroscopy ↔️ Determining structure and purity
• Arrange the following chromatography techniques in order of increasing complexity:

  1️⃣ Paper Chromatography

  2️⃣ Thin-Layer Chromatography (TLC)

  3️⃣ Column Chromatography

  4️⃣ Gas Chromatography (GC)

  5️⃣ High-Performance Liquid Chromatography (HPLC)
• What type of mobile phase is used in gas chromatography?

  Gas
• Match the chromatography technique with its description:

  Paper Chromatography ↔️ Uses stationary and mobile phases

  TLC ↔️ Separates based on migration rates

  Column Chromatography ↔️ Components pass through a column

  Gas Chromatography ↔️ Separates volatile components
• Precision describes how reproducible the measurements are.


  True
• What is the purpose of using significant figures in data processing?

  Reflect data precision
• Graphical analysis involves plotting data on graphs to identify trends and potential sources of error
• What are analytical techniques used for in chemistry?

  Identifying and quantifying substances
• What does chromatography separate in a mixture?

  Components
• In titration, the volume of one solution is measured to react completely with another, determining the concentration of an analyte
• Order the steps required to perform a titration:

  1️⃣ Prepare the titrant

  2️⃣ Add the analyte

  3️⃣ Monitor the reaction

  4️⃣ Identify the endpoint

  5️⃣ Calculate the concentration
• In acid-base titration, the endpoint is often indicated by a change in color using a pH indicator
• The concentration of an unknown solution in titration can be calculated using the volume and concentration of the titrant.

  True
• What is the purpose of acid-base titration?

  Neutralize acid or base
• What is the endpoint indicator used in redox titration?

  Potassium permanganate
• What is the formula for calculating the concentration of an unknown solution in titration?

  $C_\text{unknown} =$$\frac{C_\text{titrant} \times V_\text{titrant}}{V_\text{unknown}}$
• The endpoint in a titration is indicated by a change in color or other property.
• UV-Vis spectroscopy is used to quantify the concentration of colored compounds.

  True
• What type of electromagnetic radiation is used in NMR spectroscopy?

  Radio waves
• Analytical techniques emphasize achieving high accuracy and precision.
• What is the term for the point in a titration where the reaction is complete?

  Endpoint
• Mastering titration methods is essential for determining the composition of chemical substances.

  True
• Mastering titration methods is a key practical skill in chemistry for determining the composition of chemical substances.


  True