8. If you added the following to water what would happen to the pH of the solution. Would
become acidic, basic, or stay neutral) (6 points) a. ethanol b. phenol 9. If a compound gave a
yellow precipitate with 2,4-dinitropenyl hydrazine but did not react with Tollens reagent or turn
chromic acid green would the compound be (a) a tertiary alcohol (b) aldehyde (c) ketone 10.
Give two test that you could use to determine if a compound is an aldehyde or a ketone. 6 points)
11. Dichloromethane\'s density is 1.37 g/mL. Would it be the upper of lower layer in extraction
of a water solution? (6 points) 12. Calculate your theoretical yield of aspirin from 10 grams of
salicylic acid using the following equation: (8 points) -X 180 g aspirin =-g aspirin 10 g salicylic
acid X 1 mole 138 g salicylic acid1 mole 13. If your 10 grams of salicylic acid produced 11.1
grams of product, what would be the percent yield of your reaction? (8 points)
Solution
ans 8
Ethanol\'s hydroxyl group causes the molecule to be slightly basic
phenol in water is acidic.
ans 9 compound is a ketone
Aldehydes and ketones both react with 2,4-dinitrophenylhydrazine as a test for the carbon-
oxygen double bond to give yellow precipitate.
Tollens\' test, is used to distinguish between an aldehyde and a ketone.An aldehydes is readily
oxidized, whereas ketones are not .
ans 10
Fehling\'s Test
Equal volumes of Fehling\'s A and Fehling\'s B are mixed and the sample is added. The resulting
solution is heated.
Aldehyde - The aldehyde is oxidised and a brick red Cu(I) oxide precipitates out,
Ketone - No reaction occurs.
Tollen\'s Test
This test contains the complex [Ag(NH3)2]+. It is made by mixing ammonia with silver nitrate.
Aldehyde - Upon heating with Tollen\'s reagent solid silver metal is produced as Ag+ is reduced
to Ag.
Ketone - No reaction occurs.
ans 11
as dichloromethane is denser than water it will form lower layer and water will form upper layer
ans 12
13.04 g
ans 13
percent yield = (actual yield/theoretical yield) x 100%
= (11.1/13.04)*100
= 85.12%.
8. If you added the following to water what would happen to the pH of.pdf
1. 8. If you added the following to water what would happen to the pH of the solution. Would
become acidic, basic, or stay neutral) (6 points) a. ethanol b. phenol 9. If a compound gave a
yellow precipitate with 2,4-dinitropenyl hydrazine but did not react with Tollens reagent or turn
chromic acid green would the compound be (a) a tertiary alcohol (b) aldehyde (c) ketone 10.
Give two test that you could use to determine if a compound is an aldehyde or a ketone. 6 points)
11. Dichloromethane's density is 1.37 g/mL. Would it be the upper of lower layer in extraction
of a water solution? (6 points) 12. Calculate your theoretical yield of aspirin from 10 grams of
salicylic acid using the following equation: (8 points) -X 180 g aspirin =-g aspirin 10 g salicylic
acid X 1 mole 138 g salicylic acid1 mole 13. If your 10 grams of salicylic acid produced 11.1
grams of product, what would be the percent yield of your reaction? (8 points)
Solution
ans 8
Ethanol's hydroxyl group causes the molecule to be slightly basic
phenol in water is acidic.
ans 9 compound is a ketone
Aldehydes and ketones both react with 2,4-dinitrophenylhydrazine as a test for the carbon-
oxygen double bond to give yellow precipitate.
Tollens' test, is used to distinguish between an aldehyde and a ketone.An aldehydes is readily
oxidized, whereas ketones are not .
ans 10
Fehling's Test
Equal volumes of Fehling's A and Fehling's B are mixed and the sample is added. The resulting
solution is heated.
Aldehyde - The aldehyde is oxidised and a brick red Cu(I) oxide precipitates out,
Ketone - No reaction occurs.
Tollen's Test
This test contains the complex [Ag(NH3)2]+. It is made by mixing ammonia with silver nitrate.
Aldehyde - Upon heating with Tollen's reagent solid silver metal is produced as Ag+ is reduced
to Ag.
Ketone - No reaction occurs.
ans 11
as dichloromethane is denser than water it will form lower layer and water will form upper layer
ans 12
13.04 g
2. ans 13
percent yield = (actual yield/theoretical yield) x 100%
= (11.1/13.04)*100
= 85.12%
![8. If you added the following to water what would happen to the pH of the solution. Would
become acidic, basic, or stay neutral) (6 points) a. ethanol b. phenol 9. If a compound gave a
yellow precipitate with 2,4-dinitropenyl hydrazine but did not react with Tollens reagent or turn
chromic acid green would the compound be (a) a tertiary alcohol (b) aldehyde (c) ketone 10.
Give two test that you could use to determine if a compound is an aldehyde or a ketone. 6 points)
11. Dichloromethane's density is 1.37 g/mL. Would it be the upper of lower layer in extraction
of a water solution? (6 points) 12. Calculate your theoretical yield of aspirin from 10 grams of
salicylic acid using the following equation: (8 points) -X 180 g aspirin =-g aspirin 10 g salicylic
acid X 1 mole 138 g salicylic acid1 mole 13. If your 10 grams of salicylic acid produced 11.1
grams of product, what would be the percent yield of your reaction? (8 points)
Solution
ans 8
Ethanol's hydroxyl group causes the molecule to be slightly basic
phenol in water is acidic.
ans 9 compound is a ketone
Aldehydes and ketones both react with 2,4-dinitrophenylhydrazine as a test for the carbon-
oxygen double bond to give yellow precipitate.
Tollens' test, is used to distinguish between an aldehyde and a ketone.An aldehydes is readily
oxidized, whereas ketones are not .
ans 10
Fehling's Test
Equal volumes of Fehling's A and Fehling's B are mixed and the sample is added. The resulting
solution is heated.
Aldehyde - The aldehyde is oxidised and a brick red Cu(I) oxide precipitates out,
Ketone - No reaction occurs.
Tollen's Test
This test contains the complex [Ag(NH3)2]+. It is made by mixing ammonia with silver nitrate.
Aldehyde - Upon heating with Tollen's reagent solid silver metal is produced as Ag+ is reduced
to Ag.
Ketone - No reaction occurs.
ans 11
as dichloromethane is denser than water it will form lower layer and water will form upper layer
ans 12
13.04 g](https://image.slidesharecdn.com/8-230709135739-9c3694e9/85/8-If-you-added-the-following-to-water-what-would-happen-to-the-pH-of-pdf-1-320.jpg)
