Comments on: O Level Chemistry: Acids,Bases & Salts / Organic Chemistry http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/ Chemistry Made Easy Tue, 31 Aug 2010 11:08:12 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: sean http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/comment-page-1/#comment-857 sean Wed, 14 May 2008 16:02:25 +0000 http://simplechemconcepts.com/2007/10/22/chemistry-question-acidsbases-salts-organic-chem/#comment-857 Hi Jo. It's always easier by starting with the definition. Concentration of an acid refers to the amount of solute (grams or commonly Moles) dissolved in a fixed volume (1 dm3) of the solution. Concentration of an acid can be increased by adding more solute to the solution or removing some solvent. i.e. More Moles/Grams of solute in the solution. Strength refers to how easily an acid or alkali dissociates when dissolve in water. Strength of an acid or alkali cannot be changed. When concentration and the volume of acid given is the same, the amount (grams or Moles) of acid is then the same. Amount of gas to be produced will be dependent on the strength between the Strong & Weak Acids then. Both sulphuric acid and hydrochloric acid are known as Strong Acid, which means they ionize completely to give H+ ions in solution. Ethanoic acid is a Weak Acid, and will only dissociates partially to give H+ ions. Since amount of H+ ions in solution determines the acidity of the acid, the stronger acid will have more H+ ions and will produce more CO2 gas when it reacts with a metal carbonates. Hi Jo.

It’s always easier by starting with the definition.

Concentration of an acid refers to the amount of solute (grams or commonly Moles) dissolved in a fixed volume (1 dm3) of the solution. Concentration of an acid can be increased by adding more solute to the solution or removing some solvent. i.e. More Moles/Grams of solute in the solution.

Strength refers to how easily an acid or alkali dissociates when dissolve in water. Strength of an acid or alkali cannot be changed.

When concentration and the volume of acid given is the same, the amount (grams or Moles) of acid is then the same. Amount of gas to be produced will be dependent on the strength between the Strong & Weak Acids then.

Both sulphuric acid and hydrochloric acid are known as Strong Acid, which means they ionize completely to give H+ ions in solution. Ethanoic acid is a Weak Acid, and will only dissociates partially to give H+ ions. Since amount of H+ ions in solution determines the acidity of the acid, the stronger acid will have more H+ ions and will produce more CO2 gas when it reacts with a metal carbonates.

]]> By: sean http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/comment-page-1/#comment-855 sean Wed, 14 May 2008 15:08:59 +0000 http://simplechemconcepts.com/2007/10/22/chemistry-question-acidsbases-salts-organic-chem/#comment-855 You are spot on for that "dona". That is the correct concept and strategy to answer such questions on weak & strong acids. Keep it up. You are spot on for that “dona”. That is the correct concept and strategy to answer such questions on weak & strong acids. Keep it up.

]]> By: dona http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/comment-page-1/#comment-848 dona Tue, 13 May 2008 20:20:05 +0000 http://simplechemconcepts.com/2007/10/22/chemistry-question-acidsbases-salts-organic-chem/#comment-848 i think the volume of gas will b more for the stronger acids. The weak acids will not ionise completely therefore all the ions are not available to react. some still remain as molecules i think the volume of gas will b more for the stronger acids. The weak acids will not ionise completely therefore all the ions are not available to react. some still remain as molecules

]]> By: JO http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/comment-page-1/#comment-838 JO Fri, 09 May 2008 08:26:46 +0000 http://simplechemconcepts.com/2007/10/22/chemistry-question-acidsbases-salts-organic-chem/#comment-838 hey. what if there are 3 acids, sulphuric acid, ethanoic acid and hydrochloric acid and they are all of the same concentration and same volume. these 3 acids are added to equal amounts of calcium carbonate. will the volume of carbon dioxide released be equal or more for the stronger acids? i am rather confused about the concentration and strength of acids. i hope that someone can help me with this topic. thank you! hey.
what if there are 3 acids, sulphuric acid, ethanoic acid and hydrochloric acid and they are all of the same concentration and same volume.
these 3 acids are added to equal amounts of calcium carbonate.
will the volume of carbon dioxide released be equal or more for the stronger acids?

i am rather confused about the concentration and strength of acids. i hope that someone can help me with this topic.
thank you!

]]> By: Anonymous http://www.simplechemconcepts.com/chemistry-question-acidsbases-salts-organic-chem/comment-page-1/#comment-165 Anonymous Fri, 26 Oct 2007 11:08:00 +0000 http://simplechemconcepts.com/2007/10/22/chemistry-question-acidsbases-salts-organic-chem/#comment-165 should be ok one. last time my sch paper came out i wrote about ph paper.<br/>they did not limit it just to chemical/physical test :) should be ok one. last time my sch paper came out i wrote about ph paper.
they did not limit it just to chemical/physical test :)

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