Shaun the Sheep - Forum - Sheep Talk - Anyone know any facts about alkalies? SERIOUSLY I NEED TO DO IT QUICK!

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Sheep Talk > Anyone know any facts about alkalies? SERIOUSLY I NEED TO DO IT QUICK!

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1. By 123 Satr 321 Sep 17th 2009

   ANYONE KNOW ANY FACTS about alkalies? its for my homework tommorow please respond quick! If you really wnat to help,please do research...PLEASE!"

2. By Emmerdale2 Sep 17th 2009

   what is a alkilile

3. By 123 Satr 321 Sep 17th 2009

   in science...

4. By Emmerdale2 Sep 17th 2009

   and that meens

5. By 123 Satr 321 Sep 17th 2009

   alkalines and acids...if your not in high-school you wouldnt know

6. By Zammy_Cat Sep 17th 2009

   Y cant u look it up ur on a computer rnt u or something that has the internet

7. By Finlaybear Sep 17th 2009

   an alkali is any substance which produces OH- ions in water.

8. By 123 Satr 321 Sep 17th 2009

   thanks,finlaybear,your my best friend for the week, i will treat yoo 'more' nicely than others! Now i have to write about what reb cabbage dies and instructions!

9. By Finlaybear Sep 17th 2009

   Try a google search,this is for GCSE chemistry I suppose?

10. By 123 Satr 321 Sep 17th 2009

    page cant be found

11. By Finlaybear Sep 17th 2009

    Yes, you could try googling S-Cool + GCSE chemistry. Good luck

12. By singing sheep Sep 17th 2009

    Moderately-concentrated solutions (over 10−3 M) have a pH of 10 or greater. This means that they will turn phenolphthalein from colorless to pink.
    Concentrated solutions are caustic (causing chemical burns).
    Alkaline solutions are slippery or soapy to the touch, due to the saponification of the fatty acids on the surface of the skin.
    Alkalis are normally water soluble, although some like barium carbonate are only soluble when reacting with an acidic aqueous solution.
    Acids and alkalis are measured on a pH scale
    
    Alkalis are the opposite of acids. They have very low concentrations of hydrogen ions when dissolved in water. their pH values are above 7.
    
    pH 7 is neutral. A solution with a pH of 7 is neither acidic nor alkaline.
    
    Alkalis will turn red litmus paper to blue.
    
    When food is squirted from your stomach into your small intestine, an alkaline liquid called bile is added to it. We say that bile neutralises the stomach acid, but this is not strictly true. In fact so much bile is added that the mixture of food, bile and enzymes is turned into an alkaline solution. It is about pH 12. The enzymes in your small intestines work best at pH 12.
    
    The alkalis which you are most likely to use at school are sodium hydroxide and calcium hydroxide. Take care when using sodium hydroxide because it is very caustic (it will burn your skin). Your teacher will probably tell you to wash your hands after using it, or may even ask you to wear rubber gloves. Sodium hydroxide is a strong alkali, i.e. it has a high pH. Calcium hydroxide is a much weaker alkali; it is also much safer to use since it is not caustic. Your biology teacher will probably call it "lime water". You can use it to test for carbon dioxide, which will turn lime water cloudy. If you breathe out through a straw bubbling your breath through a test tube of lime water, it will go cloudy: this proves that we breathe out carbon dioxide.
    
    Lithium, sodium, potassium, rubidium, caesium and francium are all very reactive metals: they will dissolve in water to make alkaline solutions. These metals are called alkali metals and belong to group I of the periodic table. When they are dissolved in water they make hydroxides: lithium hydroxide, sodium hydroxide, potassium hydroxide and so on. You can find out more about these elements on my GCSE web site.
    
    Beryllium, magnesium, calcium, strontium, barium, and radium will also make hydroxides. These metals are called alkaline earth metals. they belong to group II of the periodic table.
    
    You might find some alkaline chemicals in your kitchen. You can test chemicals to find out if they are acids or alkalis using indicators: have a look at my page on indicators to find out how to make your own "litmus paper".
    
    I hope that you will be able to remember most of the facts on this page, but you must memorise the definition of alkalis. Write it on a small index card. Put the red words on one side of the card and the blue ones on the other. Add the card to your revision pack.
    
    Alkalis are the opposite of acids. They have a pH of more than SEVEN.Alkalis are commonly found in household cleaners like bleach

13. By imaginepeacex Sep 17th 2009

    Sounds complicated.

14. By number Sep 17th 2009

    i did that at school a while back ago.

15. By imaginepeacex Sep 17th 2009

    I think we've done it
    But i was too busy doodling :L

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