The gray color of the naphthalene obtained after the usual purification procedure should be explained. Concept introduction: Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature. Following are some of the types of recrystallization: Single-solvent recrystallization Multi-solvent recrystallization Hot filtration-recrystallization

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Answer 1

Question

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

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Answer 2

Question

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

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Answer 3

Question

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

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Answer 4

Question

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

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Answer 5

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

Answer 6

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

Answer 7

Chapter 4, Problem 1Q

Interpretation Introduction

Interpretation:

The gray color of the naphthalene obtained after the usual purification procedure should be explained.

Concept introduction:

Recrystallization is a technique that is used to purify the impure compounds. It is based on the principle that the solubility of substances increases with the increase in temperature.

Following are some of the types of recrystallization:

Single-solvent recrystallization

Multi-solvent recrystallization

Hot filtration-recrystallization

Answer 8

Expert Solution & Answer

Answer to Problem 1Q

The gray color of naphthalene is due to the impurity of charcoal.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

The change in color of naphthalene indicates the presence of an impurity in it. But this impurity neither lowers the melting point of the sample nor widens the melting point range. So this is not a normal small-sized impurity and it shows only color change in the sample. The color of the sample changes from white to gray so the impurity may be charcoal (black) that is used in the recrystallization process.

Answer 12

Conclusion

Due to the impurity of charcoal, naphthalene found to have grayish color.

Answer 13

Ch. 4 - Prob. 1Q Ch. 4 - Prob. 2Q Ch. 4 - Prob. 3Q Ch. 4 - Prob. 4Q Ch. 4 - Prob. 5Q Ch. 4 - Prob. 6Q Ch. 4 - Prob. 7Q Ch. 4 - Prob. 8Q Ch. 4 - Prob. 9Q Ch. 4 - Prob. 10Q

Answer to Problem 1Q

Explanation of Solution

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Chapter 4 Solutions