1. Why can we use methyl alcohol to dissolve an aspirin tablet? 2. When Phenolphthalein is...
1. Why can we use methyl alcohol to dissolve an aspirin tablet?
2. When Phenolphthalein is added in a solution, the solution turns to pink but clears up when swirled. why/how did the solution became clear?
Homework Answers
- In chemistry there is a concept of like dissolve like that means polar compound will get dissolve in polar solvent. Similarly non-polar will get dissolve in non-polar solvent. Aspirin contains a benzene ring (non polar), a carboxyl group (polar), and an ester. Hence it has both polar and non-polar components.
Methyl alcohol (CH3OH) contains a methyl group and hydroxyl group. It is highly polar compound, so its affinity for aspirin is very low and solubility will be less.
Moreover methyl alcohol is toxic to living beings, hence traces of this solvent left can harm. Hence it is mostly avoided in pharmaceutical usage.
Ethyl alcohol is slightly non polar (CH3CH2OH) as compare to methyl alcohol and safer to use. Its polarity matches that of aspirin due to additional carbon group, hence it also has both polar and non-polar component. Hence aspirin tablet will get dissolve in this.
Add Answer to:
1. Why can we use methyl alcohol to dissolve an
aspirin tablet?
2. When Phenolphthalein is...
Questions 1. a. Carbon dioxide from the atmosphere will dissolve in a NaOH solution if it...
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For each experiment described below 1) provide the relevant equilibrium reaction or reactions, 2) use LeChatelier's...
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PREPARATION OF PHARMACEUTICALS - Fischer Esterification Reactions Q: Calculate the expected mass of both methyl salicylate and aspirin assuming 100% yield. EXPERIMENT7 PREPARATION OF PHARMACEUTICALS...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
Section Name Experiment 2 Advance Study Assignment: Properties of Systems in Chemical Equilibrium 1. Methyl orange,...
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1. Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the...
1. Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMO(aq) = H(aq) + MO"(aq) red yellow If methyl orange is added to distilled water, the solution turns yellow. If a drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH the color reverts to yellow a. Why does adding 6 M HCl to...
B. The following questions are from today's experiment: EQUL 307: pH, Acids, and Bases Use the...
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please use the information provided above to answer the questions below (the 2 worksheet) _35%. 1:59...
please use the information provided above to answer
the questions below (the 2 worksheet)
_35%. 1:59 AM Introduction In chemistry laboratory, it is sometimes necessary to experimentally determine the concentration of an unknown acid or base solution. A procedure for making this kind of determination is called an acid-base titration. In this laboratory process, a solution of known concentration, called the standard solution, is carefully added to a solution of unknown concentration until the mixture becomes neutral. The neutral point...
can someone help me with these lab questioins on titration of diluted vinegar When titrating an...
can someone help me with these lab questioins on titration of
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When titrating an acid with a base, phenolphthalein is often used to indicate the end of the titration. When placed in an acidic solution, phenolphthalein turns the solution a. b. green colourless pink. a milky white. C. d. To make a standard NaOH solution, about 13 mL of 3 M NaOH is mixed with about 300 mL of deionized water (H2OD) in a 500 ml beaker. Why...
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Elimination Reactions Prelab Date 1. Explain why we get a different product when we use bulky...
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Questions 1. a. Carbon dioxide from the atmosphere will dissolve in a NaOH solution if it is left uncovered. How would this affect the molarity of NaOH? b. Why does your titrated solution turn from pink back to colorless after several minutes? 2. What is the difference between an equivalence point and an endpoint? 3. Phenolphthalein actually changes color at around pH 9. Why, then, is it a suitable indicator for the titrations you did today?
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
Section Name Experiment 2 Advance Study Assignment: Properties of Systems in Chemical Equilibrium 1. Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMO(aq) H(aq) + MO (aq) red yellow If methyl orange is added to distilled water, the solution turns yellow. If a drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH...
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please use the information provided above to answer
the questions below (the 2 worksheet)
_35%. 1:59 AM Introduction In chemistry laboratory, it is sometimes necessary to experimentally determine the concentration of an unknown acid or base solution. A procedure for making this kind of determination is called an acid-base titration. In this laboratory process, a solution of known concentration, called the standard solution, is carefully added to a solution of unknown concentration until the mixture becomes neutral. The neutral point...
can someone help me with these lab questioins on titration of
diluted vinegar
When titrating an acid with a base, phenolphthalein is often used to indicate the end of the titration. When placed in an acidic solution, phenolphthalein turns the solution a. b. green colourless pink. a milky white. C. d. To make a standard NaOH solution, about 13 mL of 3 M NaOH is mixed with about 300 mL of deionized water (H2OD) in a 500 ml beaker. Why...
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