Experiment 1: Specific Gravity Determination Quiz

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Questions and Answers

What is the purpose of the experiment described in the text?

  • To determine the specific gravity of simple syrup using a pycnometer (correct)
  • To determine the specific gravity of simple syrup using a hydrometer
  • To determine the specific gravity of distilled water using a hydrometer
  • To determine the specific gravity of distilled water using a pycnometer

Which material is NOT required for the experiment?

  • Simple syrup
  • Thermometer
  • Distilled water
  • Burette (correct)

What is done after the pycnometer with its contents is warmed to 25°C?

  • The pycnometer is filled with distilled water
  • The hydrometer is inserted to measure the specific gravity
  • It is immediately placed in a dessicator
  • Excess liquid is carefully wiped off and then weighed (correct)

What is the purpose of using due precautions when fitting the thermometer to the pycnometer?

<p>To avoid air bubbles in the pycnometer (A)</p>
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What temperature is the simple syrup cooled to before being filled in the pycnometer?

<p>1-3 degrees below 25°C (A)</p>
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What is the main purpose of using distilled water in the experiment?

<p>To compare with the specific gravity of simple syrup (B)</p>
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What is the formula for calculating the specific gravity of the syrup at 25°C?

<p>Weigh the empty pycnometer, then weigh it filled with syrup at 25°C. Subtract the two weights and divide by the weight of distilled water at 25°C. (D)</p>
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What is the purpose of a hydrometer?

<p>To determine quickly the approximate specific gravity or density of liquids by flotation. (D)</p>
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Why are specific gravity hydrometers usually made in sets of six?

<p>To cover different ranges in specific gravities, allowing a complete set to suffice for various liquids. (D)</p>
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What does a hydrometer typically consist of?

<p>A sealed glass tube weighted with mercury and often provided with a thermometer. (B)</p>
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