Online Treasure Hunt on Acids & Bases

Renz Vincent Libot

Euler Benedict Mendoza

•A base in chemistry is an aqueous substance that can accept hydronium ions.

BASE:

ACID:•An acid (from the Latin acidus/acēre meaning sour) is a substance which reacts with a base.

ACIDS AND BASES

What are the physical and chemical behavior of acids and bases?

•taste sour•corrosive to metals•change litmus to red•become less acidic when mixed with bases.

ACIDS:

BASES: 

•feel slippery•change litmus to blue•become less basic when mixed with acids

How do we differentiate an acid from a base?

ACIDS:

•release a hydroxide ion into water solution.•neutralize acids in a neutralization reaction.

BASES:

•neutralize bases in a neutralization reaction. An acid and a base combine to make a  salt and water. A salt is any ionic compound that could be made with the anion of an acid and the cation of a base.

How are the strength of acids and bases identified?  

ACIDS

1. Strong Acids• completely dissociate

in water•forming H+ and an anion. 2. Weak Acids•partially dissociates in water to give H+ and the anion 

BASES

1. Strong Bases•they dissociate 100% into the cation and OH- (hydroxide ion). 2. Weak Bases•do not furnish OH- ions by dissociation.•react with water to furnish the OH- ions.

How are acids and bases quantified?

•Weak acids are titrated in the presence of indicators which change under slightly alkaline conditions.

•Weak bases should be titrated in the presence of indicators which change under slightly acidic conditions.

What are pH indicators? •halochromic chemical compound that is added in small amounts to a solution so that the pH (acidity or basicity) of the solution can be determined visually. Hence a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model.

What are common applications/uses of acids and bases?

DISSOCIATION:•the separation of a molecule into ions, and it is a key factor for evaluating the "strength" of acids and bases. The more a substance is prone to dissociation, the better it can conduct an electric current, because the separation of charges provides a "pathway" for the current's flow

NEUTRALIZATION:

the process whereby an acid and base react with one another to form a salt and water. The human stomach produces hydrochloric acid, commonly known as "stomach acid." It is generated in the digestion process, but when a person eats something requiring the stomach to work overtime in digesting it—say, a pizza—the stomach may generate excess hydrochloric acid, and the result is "heartburn." When this happens, people often take antacids, which contain a base such as aluminum hydroxide (Al[OH] 3 ) or magnesium hydroxide (Mg[OH] 2 ). 

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