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Questions and Answers
How many grams of Solid #4 did you add before solid remained visible in solution in the first part of Experiment 1?
How many grams of Solid #4 did you add before solid remained visible in solution in the first part of Experiment 1?
1 g
How many milliliters (mL) of water were added to the graduated cylinder in the second part of Experiment 1?
How many milliliters (mL) of water were added to the graduated cylinder in the second part of Experiment 1?
20 mL
How many grams of Solid #4 did you add to the graduated cylinder in the second part of Experiment 1?
How many grams of Solid #4 did you add to the graduated cylinder in the second part of Experiment 1?
10 g
What was the volume reading on the graduated cylinder after you added Solid #4 to the water in the second part of Experiment 1?
What was the volume reading on the graduated cylinder after you added Solid #4 to the water in the second part of Experiment 1?
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What was the temperature when Solid #4 melted in the third part of Experiment 1?
What was the temperature when Solid #4 melted in the third part of Experiment 1?
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How soluble was Solid #4?
How soluble was Solid #4?
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Which solid substance(s) have the closest solubility to Solid #4?
Which solid substance(s) have the closest solubility to Solid #4?
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What volume of water did Solid #4 displace?
What volume of water did Solid #4 displace?
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What is the density of Solid #4 based on the data that you collected?
What is the density of Solid #4 based on the data that you collected?
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How many milliliters (mL) of Liquid #7 did you add to the graduated cylinder in the first part of Experiment 2?
How many milliliters (mL) of Liquid #7 did you add to the graduated cylinder in the first part of Experiment 2?
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What was the combined mass of Liquid #7 and the graduated cylinder in the first part of Experiment 2?
What was the combined mass of Liquid #7 and the graduated cylinder in the first part of Experiment 2?
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How many milliliters (mL) of Liquid #7 were added to the test tube in the second part of Experiment 2?
How many milliliters (mL) of Liquid #7 were added to the test tube in the second part of Experiment 2?
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At what temperature did Liquid #7 boil in the second part of Experiment 2?
At what temperature did Liquid #7 boil in the second part of Experiment 2?
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What was the mass of 10 mL of Liquid #7 in the first part of Experiment 2?
What was the mass of 10 mL of Liquid #7 in the first part of Experiment 2?
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What was the density of Liquid #7 based on the data you collected in the first part of Experiment 2?
What was the density of Liquid #7 based on the data you collected in the first part of Experiment 2?
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Identify the unknown Solid #4 using the table of Intensive Properties of Solid Compounds.
Identify the unknown Solid #4 using the table of Intensive Properties of Solid Compounds.
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Which liquid has the closest density to Liquid #7?
Which liquid has the closest density to Liquid #7?
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Why was it important to perform several tests on the unknown solid?
Why was it important to perform several tests on the unknown solid?
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Which liquid has the closest boiling point to Liquid #7?
Which liquid has the closest boiling point to Liquid #7?
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A property of a substance that depends on the amount of the substance is a(n) _____.
A property of a substance that depends on the amount of the substance is a(n) _____.
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Which of the following is an intensive property?
Which of the following is an intensive property?
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Which of the following is an extensive property?
Which of the following is an extensive property?
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Identify the compound from the data reported in the table.
Identify the compound from the data reported in the table.
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Study Notes
Experiment 1: Solid #4 Analysis
- First part involved adding 1 g of Solid #4 before it remained visible in the solution.
- A total of 20 mL of water was added to the graduated cylinder.
- In the second part, 10 g of Solid #4 was added to the graduated cylinder.
- The volume reading after adding Solid #4 was approximately 29.5 mL.
- Solid #4 melted at a temperature of around 71.0 °C.
- Solubility assessment indicated that Solid #4 is not soluble in water.
- Closest solubility match to Solid #4 was either BHT or calcium carbonate.
- Solid #4 displaced approximately 9.5 mL of water.
- The density calculated for Solid #4 was about 1.1 g/mL.
Experiment 2: Liquid #7 Analysis
- 10 mL of Liquid #7 was added to the graduated cylinder in the first part.
- The combined mass of Liquid #7 and graduated cylinder was approximately 83.689 g.
- Another 10 mL of Liquid #7 was added to a test tube in the second part.
- Liquid #7 boiled at a temperature of around 108.0 °C.
- The mass of 10 mL of Liquid #7 was approximately 8.689 g.
- Density calculated for Liquid #7 was around 0.869 g/mL.
Identification and Analysis
- Solid #4 identified as BHT based on intensive properties.
- The liquid with the closest density to Liquid #7 was cyclopentylamine.
- Cyclopentylamine also matched closely in boiling point to Liquid #7.
Key Properties
- Extensive property, such as height, depends on the amount of substance.
- Intensive properties include characteristics like melting point, which do not depend on the amount of substance.
- Importance of multiple tests for solid identification, as similar properties can cause confusion in distinguishing between substances.
Final Identifications
- Final identification of unknown solid was cobalt(II) chloride.
Studying That Suits You
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Description
Test your knowledge on key measurements from the Chemistry Lab Experiment 1. This quiz covers the quantities of solids and liquids used in the experiment, helping you solidify your understanding of the procedures. Ideal for students looking to review their lab techniques and measurements.
