Acids and Bases

Questions about Acids and Bases

1. What is pH?

pH is a measure  of hidrogen ion concentration of a solution .

Solution with a high of hidrogen ions have a low pH and solution with a low concentration of hidrogen ions have high pH.

       2. What are Ph values?

The pH scale measures the degree of acidity of an object. Objects that are not very acidic are called basic. The scale has values ranging from zero (the most acidic value) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7

 Do these values depend on something ? Explain.

Depend onthe amount of Hidrogen ions into a sustance is


    3.  Check Chart 3.2 about acids and bases

The table shows the acids such as chlorohydric, sulfuric and nitric; indicates the highest concentration of hydronium ionsWhen acids such as acetic, carbonic and ascorbic are weak, their concentration is lower. Vinegar, and vitamin C for example.Strong bases are related to the greatest amount of hydroxide ions.Strong bases are sodium hydroxide and potassium hydroxide.The weak bases are Ammonia and aluminum hydroxide

     4. What is neutralization?

Is the interation is that occurs between acids and bases in which propieties of each are canceled out by the other.

Examples:

In case of wasp stings, these insects inject the body with a basic substance or alkali to the skin and to neutralize it and relieve pain can be washed or put some vinegar on the affected surface

Plants cannot grow well in acidic soil.
Lime fertilisers such as powdered lime, CaO , limestone, CaCO3 or asshes of burnt wood are added to the soil neutralise it acidity.