LAB REPORT 6 AB.docx - Experiment No 6 Acids and Bases Chemistry Lab for Engineers 1107 08 The University of Texas Rio Grande Valley Fall 2016 Thalia

LAB REPORT 6 AB.docx - Experiment No 6 Acids and Bases...

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Experiment No. 6 Acids and Bases Chemistry Lab for Engineers 1107 - 08 The University of Texas Rio Grande Valley Fall 2016 Thalia Rios Brandon Ramirez Garcia
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Ramirez 2 Objective The purpose of this experiment is to identify the properties of acid solutions, base solutions as well as salts. On the other hand, to get familiar with the meaning of pH likewise to determine the pH of different acids, bases and salts. Lastly to observe the formation of precipitates in certain solutions and to write the chemical equations related with the observations made during the procedure. Introduction Throughout the experiment some chemical compounds were classified as acid, some were base and the rest were classified as salts. An acid solution can be defined as anything that donates a proton, and we refer to that proton to be a Hydrogen atom without its electron Usually this happens in water, in aqueous solution, when a proton gets donated in water, it is accepted by water, then H 2 O is converted into H 3 O + , the hydronium ion. The acid is dissociated in water forming H 3 O + and a negative Ion. A basic solution, on the other hand, are those that produce hydroxide ion OH - in aqueous solution for instance, NaOH, Ca(OH) 2 , NH 3 , etc. Finally, the salts ionic compounds, which are a combination between acid solutions and base solutions, in other words it is the neutralization product between the combination of an acid and a base reaction. Neutralization reaction, therefore, means a chemical reaction between an acid and a base. A salt can be soluble or insoluble, if it is soluble it is to be said that compounds dissolve readily in water and ions are to be present in the solution (100% ionized). If the salt is insoluble, compounds do not dissolve in water and it exists as a solid or precipitate (0% ionized). Ionic Equation means the dissociation of reactants and products; for instance: Ag + (aq) + NO - 3 (aq) + Na + (aq) + Cl - (aq) AgCl(s, White) + Na + (aq) + NO - 3 (aq)
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Ramirez 3 Then the net ionic equation, this only involves the ions involved in the reaction that it’s to be observed, one easy way to determine the net ionic equation is by crossing out the ions that are present in both sides of the equation written in the same way, from the previous equation we have: Ag + (aq) + Cl - (aq) AgCl(s, White) The others are not written because they exist in both sides of the equation in the same way.
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