Study Guide with Selected Solutions for Stoker's General, Organic, and Biological Chemistry, 7th
7th Edition
ISBN: 9781305081086
Author: STOKER, H. Stephen
Publisher: Brooks Cole
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Textbook Question
Chapter 1, Problem 1.24EP
Classify each of the following statements as true or false.
- a. All homogeneous mixtures must contain at least two substances.
- b. Heterogeneous mixtures, but not homogeneous mixtures, can have a variable composition.
- c. Pure substances cannot be separated into other kinds of matter by physical means.
- d. The number of known pure substances is less than 100,000.
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Experiment:
Each team will be provided with 5g of a mixture of acetanilide and salicylic acid. You will divide it into three 1.5 g portions in separate 125 mL Erlenmeyer flasks savıng some for melting point analysis. Dissolve the mixture in each flask in ~60mL of DI water by heating to boiling on a hotplate. Take the flasks off the hotplate once you have a clear solution and let them stand on the bench top for 5 mins and then allow them to cool as described below.
Sample A-Let the first sample cool slowly to room temperature by letting it stand on your lab bench, with occasional stirring to promote crystallization.
Sample B-Cool the second sample 1n a tap-water bath to 10-15 °C
Sample C-Cool the third sample in an ice-bath to 0-2 °C
Results:
weight after recrystalization and melting point temp.
A=0.624g,102-115°
B=0.765g, 80-105°
C=1.135g, 77-108
What is the percent yield of A,B, and C.
Chapter 1 Solutions
Study Guide with Selected Solutions for Stoker's General, Organic, and Biological Chemistry, 7th
Ch. 1.1 - Prob. 1QQCh. 1.1 - Which of the following is classified as matter? a....Ch. 1.1 - Prob. 3QQCh. 1.2 - Prob. 1QQCh. 1.2 - Prob. 2QQCh. 1.2 - Prob. 3QQCh. 1.3 - Prob. 1QQCh. 1.3 - Prob. 2QQCh. 1.3 - In which of the following pairs of properties are...Ch. 1.4 - Prob. 1QQ
Ch. 1.4 - Prob. 2QQCh. 1.4 - Prob. 3QQCh. 1.5 - Prob. 1QQCh. 1.5 - Prob. 2QQCh. 1.5 - Prob. 3QQCh. 1.5 - Prob. 4QQCh. 1.6 - Prob. 1QQCh. 1.6 - A compound can be separated into its constituent...Ch. 1.6 - Prob. 3QQCh. 1.6 - Prob. 4QQCh. 1.7 - Which of the following statements concerning the...Ch. 1.7 - Prob. 2QQCh. 1.7 - Prob. 3QQCh. 1.7 - Prob. 4QQCh. 1.8 - The correct chemical symbol for the element...Ch. 1.8 - Prob. 2QQCh. 1.8 - Prob. 3QQCh. 1.8 - Prob. 4QQCh. 1.9 - Prob. 1QQCh. 1.9 - Prob. 2QQCh. 1.9 - The molecules present in a compound must be a....Ch. 1.9 - Prob. 4QQCh. 1.10 - Prob. 1QQCh. 1.10 - Which of the following chemical formulas fits the...Ch. 1.10 - Which of the following pairings of chemical...Ch. 1.10 - Prob. 4QQCh. 1.10 - Prob. 5QQCh. 1.10 - Prob. 6QQCh. 1 - What are the two general characteristics that all...Ch. 1 - What are the three aspects of matter that are of...Ch. 1 - Classify each of the following as matter or energy...Ch. 1 - Classify each of the following as matter or energy...Ch. 1 - Prob. 1.5EPCh. 1 - Prob. 1.6EPCh. 1 - Indicate whether each of the following substances...Ch. 1 - Indicate whether each of the following substances...Ch. 1 - Classify each of the following properties of the...Ch. 1 - Classify each of the following properties of the...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Prob. 1.13EPCh. 1 - Classify each of the following observations about...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Prob. 1.17EPCh. 1 - Classify each of the following changes as physical...Ch. 1 - Correctly complete each of the following sentences...Ch. 1 - Correctly complete each of the following sentences...Ch. 1 - Classify each of the following as (1) a physical...Ch. 1 - Classify each of the following as (1) a physical...Ch. 1 - Classify each of the following statements as true...Ch. 1 - Classify each of the following statements as true...Ch. 1 - Prob. 1.25EPCh. 1 - Assign each of the following descriptions of...Ch. 1 - Classify each of the following as a heterogeneous...Ch. 1 - Classify each of the following as a heterogeneous...Ch. 1 - From the information given, classify each of the...Ch. 1 - From the information given, classify each of the...Ch. 1 - Prob. 1.31EPCh. 1 - From the information given in the following...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Consider two boxes with the following contents:...Ch. 1 - Consider two boxes with the following contents:...Ch. 1 - Assign each of the following descriptions of...Ch. 1 - Assign each of the following descriptions of...Ch. 1 - Indicate whether each of the following samples of...Ch. 1 - Indicate whether each of the following samples of...Ch. 1 - Indicate whether each of the following...Ch. 1 - Indicate whether each of the following...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Prob. 1.45EPCh. 1 - Indicate whether each of the following statements...Ch. 1 - Prob. 1.47EPCh. 1 - Prob. 1.48EPCh. 1 - Give the name of the element denoted by each of...Ch. 1 - Prob. 1.50EPCh. 1 - Prob. 1.51EPCh. 1 - Prob. 1.52EPCh. 1 - Write the chemical symbol for each member of the...Ch. 1 - Write the chemical symbol for each member of the...Ch. 1 - In which of the following sequences of elements do...Ch. 1 - In which of the following sequences of elements do...Ch. 1 - Classify the substances represented by the...Ch. 1 - Classify the substances represented by the...Ch. 1 - Classify the substances represented by the models...Ch. 1 - Classify the substances represented by the models...Ch. 1 - Classify the substances represented by the models...Ch. 1 - Classify the substances represented by the models...Ch. 1 - Assign each of the following molecular...Ch. 1 - Assign each of the following molecular...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - Indicate whether each of the following statements...Ch. 1 - In the following diagrams, the different colored...Ch. 1 - In the following diagrams, different colored...Ch. 1 - Assign each of the following descriptions of...Ch. 1 - Assign each of the following descriptions of...Ch. 1 - In the following diagram, the different colored...Ch. 1 - Using the diagrams given in problem 1-71, select...Ch. 1 - Write chemical formulas for the substances...Ch. 1 - Write chemical formulas for the substances...Ch. 1 - Prob. 1.75EPCh. 1 - Prob. 1.76EPCh. 1 - Prob. 1.77EPCh. 1 - Prob. 1.78EPCh. 1 - Write all possible chemical formulas for a...Ch. 1 - Write all possible chemical formulas for a...Ch. 1 - Write a chemical formula for each of the following...Ch. 1 - Write a chemical formula for each of the following...Ch. 1 - Prob. 1.83EPCh. 1 - Prob. 1.84EPCh. 1 - On the basis of the given information, determine...Ch. 1 - On the basis of the information given, determine...Ch. 1 - Prob. 1.87EPCh. 1 - A mixture contains the following five pure...
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