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Application of acids and bases in our daily lives

Science formative


on 24 November 2012

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Transcript of Application of acids and bases in our daily lives

Application of acids and bases in our daily lives What are Acids and Bases
* Acids are sour.

* Acids have a pH between 0 and 6, with 0-2 being strongly acidic.

* Strong acids are corrosive.

* The strength of an acid depends on how many hydrogen ions form.

* When an alkali is added to an acid the product is neutral. *Bases are bitter, sticky in texture and slippery.

* A base is any substances with a pH between 8 and
14 with 14 being the strongly basic.

* When bases react with metal, they usually form hydrogen. Acids found at Home:

* Lemons (citric acid).
* Fruit and veg (absorbent acid).
* Soft drinks, such as coke (carbonic acid).
* Tea (tannic acid).
* Vinegar.
* Leafy vegetables ( ascorbic acid).
* Curd ( Lactic acid).
* The amount of hydrogen protons in any substance and the strength of an acid is measured with various pH indicators.

*A pH indicator is used to measure the acidity or alkalinity of a substance

* An acidic substance turns blue litmus paper red whereas an alkaline substance turns red litmus paper blue.

* Red cabbage can be used as an indicator and is preferred by many people as it is easily accessible. It turns very acidic solutions red, neutral solutions purplish, and basic solutions greenish- yellow. Examples of Bases found at Home:

* Soap.
* Any kind of detergent.
* Lime.
* Baking soda/powder.
* Window cleaner.
* Milk.
* Shower Gel.
* Hand-Wash.
* Toothpaste. Problem: You are in Mombasa and a bug has just bitten you making your skin irritable. Problem: You're stranded in the ocean and a jelly fish has just stung the heel of your foot, you have no first aid kit with you. Problem: Your classmate has just spilled concentrated hydrochloric acid on a table in the science lab. Problem: It's your 16th birthday tomorrow and you have a large pimple on your nose but the party must go on. Did you Know!? Treatment: pH Indicators Acids Bases Bugs in Mombasa leave skin very irritable which will cause discomfort to the person. Apply a small amount of natural toothpaste onto the bite to stop any further irritation. The toothpaste dries the wound up; try to leave it on the skin overnight. Solution * The first thing you should do is get the person out of the water to stop any further damage

* Then reomve any tentacles with sand or with a towel/piece of cloth. Touching will cause more damage and excrutiating pain to the victim.

* Most people say that urine is a good way to stop the pain when a first aid kit is out of reach, This will be convenient for victim as it will stop the initial pain. Solution by Neutralisation Neutralisation occurs when a base is added to an alkali and vice versa to form a neutral substance. Adding a strong alkali to the spilled hydrochloric acid would neutralise it and make it less dangerous. If possible, add sodium hydroxide or lithium hydroxide to the spilled acid.
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