[PDF] [PDF] FS14, CEM255, Week 9 - MSU chemistry

[PDF] Benzoic Acid from Ethyl Benzoate by Base Hydrolysis

with aqueous sodium hydroxide, the reaction going to completion, to give sodium first obtain sodium benzoate solution, and then benzoic acid from ethyl benzoate Methyl benzoate reacts with base according to the following equation: C

[PDF] Experiment 5 Carboxylic Acids and Saponification of Methyl

(NaOH) catalyzed hydrolysis (saponification) reaction of an ester (methyl benzoate) to the subsequent water soluble carboxylate salt (sodium benzoate) and 

[PDF] EFFECT OF REACTION TIME ON BASE HYDROLYSIS OF METHYL

Benzoic acid was synthesized from methyl benzoate by base hydrolysis in the present of NaOH and KOH as catalyst in this study According to Bruice (2006), 

[PDF] HYDROLYSIS OF SEVERAL SUBSTITUTED METHYL BENZOATES

Key words--hydrolysis, aqueous, esters, methyl benzoate, pH, linear free energy relationship (LFER), hammett, activation The mechanism of carboxylic ester hydrolysis addition of NaOH or HCI, and their ionic strengths were adjusted to 

[PDF] FS14, CEM255, Week 9 - MSU chemistry

Carboxylic Acids Preparation of Methyl 3-Nitrobenzoate Use the rest of your ester to set up the next reaction NaOH is VERY hydroscopic and a very strong base (DON'T TOUCH mass of methyl benzoate = 2 1 mL x 1 09 g/mL = 2 29 g

[PDF] 1230 - Hazardous Substance Fact Sheet

Methyl Benzoate is on the Right to Know Hazardous Substance SODIUM HYDROXIDE and POTASSIUM HYDROXIDE) and Molecular Formula: C8H8O2

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Week 7-9

Carboxylic Acids

Preparation of Methyl 3-Nitrobenzoate

Preparation of 3-Nitrobenzoic Acid

Preparation of 3-Nitrobenzamide

Preparation of 3-Nitrobenzoic Acid

CO 2 CH 3 NO 2

1. NaOH, heat

2, HCl

CO 2 H NO 2

Preparation of 3-Nitrobenzoic Acid

Basic Hydrolysis Mechanism

(Saponification)

Saponification

Hydrolysis of Triglycerides

Get the methyl 3-nitrobenzoate you made last time.

Keep a small amount to take mp.

Use the rest of your ester to set up the next reaction. The procedure in the manual is written for 1 g of ester. You will NEED to ADJUST the amounts to correspond to your amount of ester. NaOH is VERY hydroscopic and a very strong base (DON'T TOUCH IT with bare hands)

Overall

CO 2 CH 3 NO 2

1. NaOH, heat

2, HCl

CO 2 H NO 2

1 g0.7 g

2 mL 2.2 g X X X

2.2 x 0.7 g

2.2 x 2 mL

Preparation of 3-Nitrobenzoic Acid

Procedure

Weigh NaOH

in a beaker!

Mix ester +

water + NaOH 50 mL

Heat over steam bath with

CONTINUOUS SWIRLING

until all crystals have melted and the solution turns pale yellow. After the solution is transparent / pale yellow keep heating for 5 more minutes for the reaction to be completed.

Preparation of 3-Nitrobenzoic Acid

Procedure

Dilute the solution

with an equal volume of water Add the diluted solution to a beaker containing 2 ml of concentrated HCl, while stirring.

Ice bath

Vacuum

Filtration Dry filter

spread solid on watch glass

Calculating Moles of Compounds

1. If a Solid

Mole =

g of Compound

Molecular weight

2. If a Liquid

Molarity (M) =

Moles Liter

Mole = M x Liter

Also:

Density (d) =

Mass

Volume

grams mL

Mass = mL x d

mass of methyl benzoate = 2.1 mL x 1.09 g/mL = 2.29 g How many moles are there in 7.5 mL of concentrated sulfuric acid?

M of concentrated Sufuric acid =

Moles of sufuric acid

0.0075 L= 18

Moles of sulfuric acid = 18 moles/L x 0.0075 L = 0.135 molesquotesdbs_dbs17.pdfusesText_23