A pure compound has a literature melting point of 136 °C. In the laboratory, three different students recrystallized crude samples of the compound and measured the melting point range for the crystals that they recovered. In the order listed, which melting point ranges best correspond to a ‘pure’ compound, an ‘impure’ compound, and a compound that was heated too quickly while measuring its melting point? a. 132 – 136 °C; 134 – 139 °C; 136 – 137 °C b. 132 – 136 °C; 136 – 137 °C; 134 – 139 °C c. 134 – 139 °C; 132 – 136 °C; 136 – 137 °C d. 134 – 139 °C; 136 – 137 °C; 132 – 136 °C e. 136 – 137 °C; 132 – 136 °C; 134 – 139 °C f. 136 – 137 °C; 134 – 139 °C; 132 – 136 °C
A pure compound has a literature melting point of 136 °C. In the laboratory, three different students recrystallized crude samples of the compound and measured the melting point range for the crystals that they recovered. In the order listed, which melting point ranges best correspond to a ‘pure’ compound, an ‘impure’ compound, and a compound that was heated too quickly while measuring its melting point? a. 132 – 136 °C; 134 – 139 °C; 136 – 137 °C b. 132 – 136 °C; 136 – 137 °C; 134 – 139 °C c. 134 – 139 °C; 132 – 136 °C; 136 – 137 °C d. 134 – 139 °C; 136 – 137 °C; 132 – 136 °C e. 136 – 137 °C; 132 – 136 °C; 134 – 139 °C f. 136 – 137 °C; 134 – 139 °C; 132 – 136 °C
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A pure compound has a literature melting point of 136 °C. In the laboratory, three different students recrystallized crude samples of the compound and measured the melting point range for the crystals that they recovered. In the order listed, which melting point ranges best correspond to a ‘pure’ compound, an ‘impure’ compound, and a compound that was heated too quickly while measuring its melting point?
a. 132 – 136 °C; 134 – 139 °C; 136 – 137 °C
b. 132 – 136 °C; 136 – 137 °C; 134 – 139 °C
c. 134 – 139 °C; 132 – 136 °C; 136 – 137 °C
d. 134 – 139 °C; 136 – 137 °C; 132 – 136 °C
e. 136 – 137 °C; 132 – 136 °C; 134 – 139 °C
f. 136 – 137 °C; 134 – 139 °C; 132 – 136 °C
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Melting point of a compound helps in the identification of purity of the compound.
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