Chemical Forums

Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: azumore on June 16, 2010, 04:30:55 PM

Title: Benzene Carboxylic acid
Post by: azumore on June 16, 2010, 04:30:55 PM

How can you test that it's acidic, without using indicators?

Title: Re: Benzene Carboxylic acid
Post by: AnkurGel on June 16, 2010, 08:17:30 PM

If by indicators you mean specific indicators to test a compound for acidity or basicity.You can refrain it by Benzoic acid's reaction with acid and bases. As normally acid will react with base with it's affinity to give salt and water; And remains unreacted with acid + acid reaction.

Title: Re: Benzene Carboxylic acid
Post by: SVXX on June 17, 2010, 12:00:08 AM

By indicators I assume you mean phenolphthalein, methyl orange, etc. The best way to test for the acidity of a benzoic acid is to react it with a base like NaOH, which will spawn sodium benzoate via a neutralization reaction.

Title: Re: Benzene Carboxylic acid
Post by: Jorriss on June 17, 2010, 01:57:19 AM

Is there something wrong with pH paper?

Title: Re: Benzene Carboxylic acid
Post by: discodermolide on July 10, 2010, 12:57:14 PM

Quote from: azumore on June 16, 2010, 04:30:55 PM

How can you test that it's acidic, without using indicators?

Simple: react it with sodium hydrogen carbonate solution, if you get CO2 formed then the compound is acidic!