Gvgrty

Páginas: 2 (400 palabras) Publicado: 2 de diciembre de 2012
Science;
* What is PH?
-PH (potential of hydrogen) is the measurement of the hydrogen ion concentration. Every aqueous solution can be measured to determine its pH value. Is used to indicate thestrength of an acid or base.
-How can it be measure?
- PH can be measured with litmus paper. Litmus paper is a common indicator made from lichen plants. In acids, blue litmus paper turn to red. Inbases, red litmus paper turns blue. Lichens are composite organism consisting of symbiotic association of a fungus.

Lichens
-What does it mean to be basic, neutral and acidic? Givesome examples.
This value ranges from 0 to 14 pH. Values less than 7 PH exhibit acidic properties. Acids are compound that taste sour, conduct electricity, and react with metals to produce hydrogengas. They contain one or more hydrogen ion. An example of an acid is a tomato because it has a pH of 4. Milk is another example of and acid because it has a pH of 6.5.
Values over 7 PH exhibit basicproperties. Bases taste bitter, feel slippery, dissolve oils and fats, and contain one or more hydroxide ions. An example of a basic is human blood it has pH of 7.4
When something is neutral it meansthat is not an acid or a base, it is neutral. An example is pure water.
-Describe an acid-base neutralization reaction? Write its chemical equation and state the type of reaction.
- Neutralizationreaction refers to acid and base reaction producing salt and water. The equal amounts of acid react with base to form equivalent amounts of salt and water. When the reaction is complete, acid and baseare said to neutralize each other. Since water is produced, neutralization reaction is also referred as “water forming reaction”.
Acid+base→salt+water
Reaction in Ionicform:
- Na+(aq)+OH−1 (aq)+H+(aq)+Cl− (aq) →Na+(aq)+Cl− (aq)+H2O
It’s a double replacement reaction
* What is litmus paper?
* Litmus paper is a common indicator made from lichen plants....
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