CLASS WORKACIDS, BASES AND ALKALIS

Sunday 14th OctoberLeonora Etonyeaku 7D

Which acids do we normally find in the laboratory? Use the link to

complete the slide with names and images

http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise2.shtmlDilute acids: Hydrochloric Acids, sulphuric acids,

nitric acids. These are irritant acids and can cause a problem to your skin, blisters ore red skin. Do not touch. Wash the spill off.

Concentrated acid are dangerous, and can spoil the skin if touched, so they can cut through the skin. Are corrosive.

Which acids do we normally find in the home? Use the link to

complete the slide with names and imageshttp://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material

_behaviour/acids_bases_metals/revise2.shtml

Ethanoic acids, like vinegar

Ethanoic acids are also known as Acetic acid.

Carbonic acids are usually in drinks, it’s basically the carbon in sodas and soft drinks/fizzy dinks.

Tannic acids are acids in tea, and are usually in coffee.

Ascorbic acids: are usually in citric acids, for example Vitamin C.

Citric acids are in fruits, like orange, lemon.

What is a Base?http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise3.

shtml

Bases are materials that have an effect on acids deactivates them.They are usually metal oxides, metal hydroxides, and metal carbonates or

metal hydrogen.Bases are insoluble, which means they do not dissolve in water.For example Copper Oxide, it reacts with acids, neutralizes and they don’t

dissolve in water.They also react when mixed with fat and oil.

What is an Alkali?http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise3.

shtml

An Alkali is also a base.It reacts with acids and it neutralizes them.The only difference is that it does dissolve in water.It is basically a base, but it is soluble.

Which bases do we normally find in the laboratory?

http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/acids_bases_metals/revise3.shtml

Metal Oxides:

Metal Hydroxides

Metal Carbonates

Calcium carbonate:

Copper Oxides

Calcium hydroxide

Potassium hydroxide:

Calcium Oxide

Which bases do we normally find in the home? Use the link to

complete the slide with names and imageshttp://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material

_behaviour/acids_bases_metals/revise3.shtml

Sodium Hydroxide is usually found in home, especially in drain cleaners, oven cleaners.

Ammonia, a base is widely found in cleaners. Ammonia is noticed by the smell that makes you choke.

Other weak bases and alkalis are found in toothpaste, for brushing your teeth, baking powder, when baking something like a cake, and in antacid tablets which cure a stomach-ache. We use most of these everyday of our lives so we live with acids too.

There are strong and weak bases, weak bases are ok to use while strong bases and alkalis can cause harm.