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- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. What is the general name given to the reaction between phenylamine and sodium nitrite and explain why it's necessary to carry out the reaction at low temperatures? Write the equation for the reaction between compound A and phenol Write the equation for the reaction between phenylamine and sodium nitrite.What is Chemical form and structure of oxyphenbutazone? And common salts? specify the ionisable group? and the group thatimpart its physiochemical property?About the underlying compound Select one: 1- slightly water soluble compound, used as drug of choice to treat copper toxicity as a 250 mg capsules in case of wilson’s disease as can form water soluble complex with it 2- the effectiveness of D-pencillamine over L-cysteine in treatment of metal toxicities despite the presence of identical ligand groups NH2, COOH and SH is due to its resistance to monoamino oxidase enzyme metabolism due to the lack of beta hydrogen 3- slightly water soluble compound, used as drug of choice to treat copper toxicity as a 250 mg capsules in case of wilson’s disease as can form water soluble complex with it 4- slightly water soluble compound, used as drug of choice to treat copper toxicity as a 250 mg capsules in case of wilson’s disease as can form water soluble complex with it
- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Write the equation for the reaction between compound A and phenol Give the name and suggest the colour of the precipitate B. Why is it necessary to recrystallize B several times?The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. 1g of phenylamine yielded 1.2g of compound A. Calculate the percentage yield of the reaction.The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. (a) What is the general name given to the reaction between phenylamine and sodium nitrite and explain why it's necessary to carry out the reaction at low temperatures. (b) Write the equation for the reaction between compound A and phenol
- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Give the structure of the product formed when an acidified solution of compound A is reacted with (i)Naphthalen-2-ol (2-naphthol) (ii) Sodium cyanideThe following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Questions: (i) Give the name and suggest the colour of the precipitate B. Hence explain why it is necessary to recrystallize B several times. (ii) Why was it necessary to obtain a constant melting point for B?The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Question: Answer both (i) and (ii) below (i) Give the structure of the product formed when an acidified solution of compound A is reacted with Naphthalen-2-ol (2-naphthol) and Sodium cyanide separately (ii) 1g of phenylamine yielded 1.2g of compound A. Calculate the percentage yield of the reaction.
- The following is an experimental account of the preparation of compound B from Phenylamine. 2cm3 of phenylamine are dissolved in 10cm3 of 0.5M hydrochloric acid in a test tube and cooled in an ice bath. 5cm3 of 0.2M sodium nitrate solution cooled to about 5o are added to the solution above and shaken. A salt A, C6H5N2Cl is formed, collected and dried. 1g of salt A is dissolved in 10cm3 of water, cooled and added drop by drop to a cold solution of 0.3g phenol in 5cm3 of 0.1M sodium hydroxide solution. B is precipitated, filtered, dried and the melting point determined. B is further crystallized twice and the melting point taken each time and found to be constant. Why was it necessary to obtain a constant melting point for B?A. For each pair of compounds, fill in the appropriate information needed to distinguish them. Positive Compound that will Compound A Compound B Differentiating Chemical test sign/s of react reaction (A/B) OH OH (1) Dissolution and rapid bubbling (effervescence) (2) OH NH₂ (3) (4) B (5) Formation of white precipitate (6) (7) (8) (10) (11) H₂N. OH OH OH H₂N H₂N H₂N OH S O==O O OH OH Na CH3 (9) (12)The pKa, of the conjugate acid of morpholine is 8.33. (a) Calculate the ratio of morpholine to morpholinium ion in aqueous solution at pH 7.0. (b) At what pH are the concentrations of morpholine and morpholinium ion equal?