Analytical Chemistry Lesson 1: Electrochemical Methods
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Questions and Answers

What is the primary focus of electrochemistry?

  • The study of chemical changes caused by pressure
  • The study of chemical changes caused by light
  • The study of chemical changes caused by heat
  • The interaction of electrical and chemical effects (correct)

    • What is the purpose of electrochemical methods in analytical chemistry?

  • To determine the concentration or chemical reactivity of an analyte (correct)
  • To separate mixtures of chemicals
  • To synthesize new chemicals
  • To purify chemicals

    • Which of the following is NOT an application of electrochemical methods?

  • Analyzing a solution for trace amounts of metal ions
  • Studying the rate of decay of an unstable intermediate
  • Obtaining thermodynamic data about a reaction
  • Synthesizing new chemicals (correct)

    • What is the name of the branch of chemistry that deals with the study of chemical changes caused by the passage of an electrical current?

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

    How many major groups are electrochemical methods divided into?

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

    What type of species can be analyzed using electrochemical methods?

    <p>Both metal ions and organic species</p> Signup and view all the answers

    What is the branch of chemistry that deals with the separation, identification, and quantification of chemical components?

    <p>Analytical chemistry</p> Signup and view all the answers

    What is the purpose of analytical chemistry in detecting heavy metals during water purification?

    <p>To identify the presence and quantity of chemical compounds</p> Signup and view all the answers

    What is the flexibility of FT-IR that makes it an ideal tool for environmental analysis?

    <p>It can analyze substances in practically any state: solid, liquid, or gas</p> Signup and view all the answers

    What is the scope of analytical chemistry?

    <p>It encompasses many different spectrochemical and electro-analytical techniques as well as separation methods</p> Signup and view all the answers

    What is the application of FT-IR in understanding the stability of active ingredients?

    <p>When exposed to heat and light</p> Signup and view all the answers

    What is the principle behind quantitative analysis in UV-Visible spectrophotometry?

    <p>The absorption of light is directly proportional to the concentration of the absorbing substance</p> Signup and view all the answers

    What is the purpose of a monochromator in a UV-Visible spectrophotometer?

    <p>To select the desired wavelength for targeting specific components in a sample</p> Signup and view all the answers

    What is characterized by the positions and intensities of absorption peaks in UV-Visible spectrophotometry?

    <p>The molecular structure of a substance</p> Signup and view all the answers

    What is the purpose of comparing the absorption spectra of unknown substances to those of known compounds in UV-Visible spectrophotometry?

    <p>To make qualitative assessments of the molecular structure of a substance</p> Signup and view all the answers

    What is the main application of UV-Visible spectrophotometry in determining the molecular structure of a substance?

    <p>Qualitative analysis of molecular structure</p> Signup and view all the answers

    What is the role of UV-Visible spectrophotometry in characterizing material properties?

    <p>To assess how materials interact with light, especially in terms of transmission and absorption</p> Signup and view all the answers

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