Chemistry : Organic Vs Inorganic Acids

2457 Words10 Pages
10 PRE-SACE CHEMISTRY
PRACTICAL DESIGN ASSESSMENT
"ORGANIC vs INORGANIC ACIDS"

Instructions:
Students will be supplied with a range of acids including, sulphuric, ethanoic, hydrochloric, citric acids.
From this list they are to choose an organic and inorganic acid to compare.

Students must design and conduct a simple experiment to measure the different reaction rates of the acids.

Only the following materials will be made available to students;
Ph Paper
Ph sensor and data logger
Litmus solution
Calcium carbonate powder
Calcium carbonate chips
Sodium carbonate powder
Stop watches
Magnesium strips
125 ml conical flask
1 hole stopper with plastic delivery tube
Small test tubes

Design:
Hypothesis
An inorganic acid will react with a base at a faster rate than an organic acid. This should occur as inorganic acids (particularly hydrochloric acid) possess the ability to perform complete ionization, this means that the solution “splits” completely in a solution of water. What this means is that the hydrochloric acid should dissolve the calcium carbonate chips faster than the ethanoic acid will as hydrochloric acid is inorganic, whereas ethanoic acid is an organic compound.

Independent Variable
The independent variable is the type of acid being used. The reactions will be tested using both an inorganic acid (hydrochloric) and an organic acid (ethanoic).

Dependent Variable
The dependent variable is the time taken for one gram of calcium carbonate chips to completely dissolve
Get Access