# Preparing Benzoic Acid from Benzylalcohol

Length: 574 words (1.6 double-spaced pages)

Rating: Excellent

#### Essay Preview

Preparing Benzoic Acid from Benzylalcohol

Planning (a)

Problem

The aim of this experiment is to synthesize benzioc acid, with the
highest possible yield, by oxidizing benzylalcohol.

Hypothesis

We expect the percentage yield to be about 50% due to several
processes such as cooling and filtering.

Possible Variables

- Time

- Temperature (of water)

- Filter

Planning (b)

Apparatus/ Materials

- Round bottomed flask under reflux

- benzylalcohol

- HCl

- Na2O4

- Büchner funnel

- beakers

- sodium carbonate

Procedure

The benzioc acid is synthesized by heating benzylalcohol in a round
bottomed flask under reflux. In addition to that, we use Na2O4 as a
oxidizing agent. After that, we use HCl to precipitate it. After the
some time, we filter it through a Büchner funnel before it is
recrystallized and filtered again. The mass was recorded as it was
dry.

By adding sodium carbonate, we will now test whether what obtained is
benzoic acid or not, because one can observe bobbles if it is an acid.
After that we burn it to test if it is aromatic. Soot would be
possible to obtain if it was to be aromatic.

Data Collection

Mass of benzylalcohol

3.991 grams

95.47 grams

96.68 grams

After the addition of sodium carbonate

Bubbles were obtained

After burning it

Soot was obtained

Data Processing

Mass of benzoic acid

96.68 – 95.47 = 1.21 grams

We assume that the reaction goes to completion which would mean that
one mole of benzylalcohol should give one mole of benzoic acid.

Hence, the theoretical yield is 100% by amount of mol.

Molar mass

Benzylalcohol

108 g/mol

Benzoic acid

122 g/mol

Initial amount of benzylalcohol: [IMAGE]

MLA Citation:
"Preparing Benzoic Acid from Benzylalcohol." 123HelpMe.com. 18 Jan 2020
<https://www.123helpme.com/view.asp?id=148751>.

## Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

## A Mixture Of Three Substances ( Benzoic Acid Essay

- In this experiment, a mixture of three substances (benzoic acid, 2-naphthol, and 1-4 dimethoxybenzene) will be separated based off acidity strength using the liquid-liquid extraction technique through a separatory funnel. Benzoic acid and 2-napthol will be converted into ionic salts when reacting with their appropriate bases (sodium bicarbonate and sodium hydroxide). Both ionic salts will then form solids through the addition of acidic HCl. Neutral 1,4 – dimethoxybenzene forms a solid through the evaporation of ether....   [tags: Acid, Water, Sodium chloride, Chemistry]

Research Papers
908 words (2.6 pages)

## Acid And Benzoic Acid Essay

- In this experiment, the goal is to separate naphthalene and benzoic acid from one gram of a crude mixture containing them both, using extraction. A general requirement of a solvent in extraction is solvating one of the pure compounds in solution but not the other. Position in the separatory funnel is determined by density of each layer. The denser layer will be on the bottom of the separatory funnel while the less dense layer will be the top layer of the separatory funnel. For extraction to be used as an effective method for separation, the components of a mixture that need to be recovered must not be soluble in the same solvent....   [tags: Solvent, Solubility, Chemistry, Benzene]

Research Papers
1080 words (3.1 pages)

## Uses and Advantages of Citric Acid Essay

- An acid is a substance that produces H+ to form a solution that has a pH <7. It turns litmus paper red. It reacts with bases to form a salt and water. A weak acid is an acid that dissociates incompletely, releasing only some of its protons(H+). A strong acid is an acid that fully dissociates incompletely, releasing only some of its protons(H+). A base is a substance that can accept (H+) and releases(OH-) to form a solution that has a pH>7. It turns litmus paper blue. It reacts with acids to form a salt and water....   [tags: Acid, Base, Chemistry]

Research Papers
1065 words (3 pages)

## The Gum Benzoin Tree Essay

- INTRODUCTION Benzoic acid was originally obtained from the gum Benzoin tree, and that’s where its name is derived. Benzoic acid (C7H6O2) is a weak carboxylic acid (contains an OOH functional group), which consists of an aromatic ring and is naturally used as a food preservative, therefore its capable of slowing down/halting the growth rate of bacteria that inhibit most foods. Benzoic acid is an organic molecule and in its crystalline (solid) state exists as a white powder, basically looks like tiny white crystals....   [tags: carboxylic acid, charcoal, ]

Research Papers
3188 words (9.1 pages)

## The Differences Between Strong Acid And Weak Acid Titration Essay

- The Differences between Strong acid and Weak Acid Titration Introduction: This experiment is to explore the certain properties of strong acid (HCl) and weak acid (HCOOH) and how these properties make effects on titrations. The first is to find out the properties and differences of strong acid using phenolphthalein measurement and curve measurement. The second step is to find out the properties and differences of weak acid using phenolphthalein measurement and curve. The final step is to compare the salts that produced....   [tags: PH, Acid, PH indicator, Acid dissociation constant]

Research Papers
1150 words (3.3 pages)

## Essay about Titration Is A Measured Volume Of Acid

- A titration is used to determine the amount of acid in a given solution. This is done by titrating a measured volume of acid (in this instance, acetic acid (CH3COOH)) with a solution of a strong base (usually sodium hydroxide (NaOH)), of a known concentration. The NaOH is added in small aliquots until the acid has been neutralised, and this can be determined with an indicator dye, such as phenolphthalein, or a pH meter (Nelson & Cox, 2008 pg58). In this practical, a pH meter was used and this allows for the acidity or alkalinity of a solution to be measured, and this was more accurate than using an indicator dye....   [tags: PH, Acid dissociation constant, Acetic acid]

Research Papers
1393 words (4 pages)

## A Short Note On Omega Linolenic Acid And Linoleic Acid Essays

- Fat: My overall fat intake did fall into the AMDR, of 20%-35%, at 33.5%. My report also showed my intake of omega-3 and omega-6, also known as alpha-linolenic acid and linoleic acid. I did not meet the recommendation for either one of these. The recommendation for omega-3 is 1.1 gram; I took in only about 0.02 grams. While the recommendation of omega-6 is 11 grams, I only consumed about .28 grams. Both of these fatty acids are essential to growth. Omega-6 is metabolized in the body and turned into arachidonic....   [tags: Nutrition, Fatty acid, Unsaturated fat]

Research Papers
1231 words (3.5 pages)

## The Effects Of Acid Rain On The Environment Essay example

- Some people think that acid rain can burn skin if it lands on them. This however, does not happen. Acid rain can not burn skin, it still can causes damage to plants, animals, and even structures. Acid rain occurs naturally without human interference, but since humans started to make objects that contribute to the creation of acid rain, it happens more frequently than if humans would not be involved. People not only raised the amount of acid rain that falls, they can also be the ones to bring the amount back down to reasonable levels....   [tags: Acid rain, Water, Volcano, Oxygen]

Research Papers
1170 words (3.3 pages)

## Essay on The Effects of Acid Rain on Statues

- The Effects of Acid Rain on Statues Introduction ------------ During this investigation, I will use dilute hydrochloric acid as the acid rain and crushed calcium carbonate as the chemical of the statues. Then I will time how long it takes for the limestone powder to react until there is no more left when the acid is added to it. Rain contains acid naturally as it collects carbon dioxide from the air and makes carbonic acid. Rain normally has a pH of about 5.5 – it is slightly acidic due to the carbon dioxide dissolved in it....   [tags: Acid Rain Chemical Reactions Essays]

Free Essays
2232 words (6.4 pages)

- Acid Rain Acid rain has become an environmental concern of global importance within the last decade. With the increasing environmental awareness of the "unhealthy" condition of our planet earth the concern about acid rain has not lessened. In brief, acid rain is rain with pH values of less than 5.6. When dealing with acid rain one must study and understand the process of making Sulfuric acid. In this project we will take an in depth look into the production of sulfuric acid, some of its uses and the effects of it as a pollutant in our environment....   [tags: Acid Rain Environmental Nature Essays]

Free Essays
3205 words (9.2 pages)

### Popular Essays

Amount of benzoic acid at completion: [IMAGE]

Percentage yield: [IMAGE]

Conclusion

The actual yield was about 27%. That means the underestimated
processes of purification such as stated in the hypothesis. The amount
of the produced benzoic acid in this experiment was probably higher
than the amount we have obtained in the end, because the number of
impurities in the final product were eminently lower than the amount
of lost benzoic acid due to purification processes.

After all, it is quite certain that the final product was benzoic acid
based on the fact that, according to tests, it was aromatic and
acidic.

Evaluation

Several processes, such as filtering for impurities not soluble in
water as well as filtering for impurities soluble in water, were
necessary to make sure that the final product of this reaction was as
pure as possible. However, it is very likely that at least some of the
benzoic acid was lost during that kind of processes, because the
product had to be transfered between several containers, and different
filters were used. We definitely lost some of the benzoic acid when we
filtered out the soluble impurities, because the acid is soluble as it
gave of its proton. Even though, the addition of HCl shifted the
equilibrium towards the side where the benzoic acid is undissociated,
we could not keep all the acid.

We lost a big amount of benzoic acid during the liquid filtering,
where it was dissolved to filter out the insoluble impurities. An
obvious amount was left in the filter after the dissolved benzoic acid
was precipitated due to the cooling of the solution on the funnel.

It is reasonable to assume that the obtained benzoic acid was quite
pure, so that impurities were just a small part of the mass of the
final product.

Suggestions of improvement:

- increase the number of purification processes to reduce the amount
of impurities, even though, that might result in a lower percentage
yield do to the fact that some of the benzoic acid might be lost in
processes, such as filtering

- when the acid runs through the filter, to filter out impurities, the
filter and the funnel should be warm and the solution heated more to
make sure that neither the acid precipitates nor is filtered out à
higher percentage yield

- prevent unintentional cooling and precipitation of the acid by being
faster with filtering out impurities à higher percentage yield