Use the information in the table to answer the following questions. The table indicates the solubility of the substance in different conditions substance Cold water Hot water 3M HCl 3M NaOH Benzoic acid No Yes No Yes Mg(OH)2 No No Yes No Na2SO4 Yes Yes Yes Yes Zn(OH)2 No No Yes Yes (1) Could you separate the components of a mixture of Mg(OH)2 and Zn(OH)4 by using 3M HCl? Briefly explain your answer.
Use the information in the table to answer the following questions. The table indicates the solubility of the substance in different conditions
|
substance |
Cold water |
Hot water |
3M HCl |
3M NaOH |
|
Benzoic acid |
No |
Yes |
No |
Yes |
|
Mg(OH)2 |
No |
No |
Yes |
No |
|
Na2SO4 |
Yes |
Yes |
Yes |
Yes |
|
Zn(OH)2 |
No |
No |
Yes |
Yes |
(1) Could you separate the components of a mixture of Mg(OH)2 and Zn(OH)4 by using 3M HCl? Briefly explain your answer.
(2) Briefly describe how you could separate the components of a mixture of benzoic add and Na2SO4 and recover the two separated substances.
(3) Could you separate the components of a mixture of benzoic acid, Mg(OH)2; and Na2SO4 by
using only cold water and 3M HCl? Briefly explain your answer.
(4) A mixture was known to contain three of the (our compounds in the table. After the mixture of the three solids was extracted with hot water and filtered, Compound A was obtained by evaporating the filtrate to dryness.
When 3M HCl was added to the solid residue, a clear solution resulted. After adding excess 3M NaOH solution to the acid solution, a precipitate formed. After filtration, the insoluble solid was found to be Compound B. Compound C was recovered by evaporation of the filtrate. Neither
Compound A, B, nor C was soluble in all of the solvents, that is water, 3M HCl, and 3M NaOH.
Identify Compounds A, B, and C. Briefly explain your answer.
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