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Natural sciences

Reactions that occur between different kinds of matter: acids and bases

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Leaner section

Content

Activity: to name well-known acids and bases and their functions [lo 2.1]

(A) ACIDS AND SOME OF THEIR FUNCTIONS

  • Hydrochloric acid

used for cleaning brickwork and cement;

reduces the pH levels of swimming pool water.

  • Nitric acid

used in artificial fertilisers, dyes and explosives;

present in plastics.

  • Sulphuric acid

probably the most important acid in South Africa;

an effective drying agent;

used in the preparation of fertilisers, dyes, paper and glue.

  • Phosphoric acid

used to flavour cold drinks;

used by dentists in dental cement.

  • Boric acid

used in many disinfectants;

an effective germicide.

  • Citric acid

the acid contained in oranges (citrus fruit).

  • Oxalic acid

the acid contained in tomatoes.

  • Tartaric acid

used in baking powder.

  • Acetylsalicylic acid

the acid in aspirin tablets.

  • Ascorbic acid

this is vitamin C.

  • Lactic acid

the acid formed when milk turns sour;

lactic acid is also formed in muscles, particularly after vigorous exercise.

(B) BASES AND SOME OF THEIR FUNCTIONS

  • Sodium hydroxide

used in the manufacturing of soap;

(also known as caustic soda)

used as a cleanser in drainage pipes.

  • Calcium hydroxide

present in milder soaps;

(lime water/whitewash)

used in the agricultural and building.Industries

  • Magnesium hydroxide

this is used as a purgative, as well as for other purposes (purgatives encourage the evacuation of the bowels).

  • Ammonia

is a general domestic cleaning agent;

is used as smelling salts (sal volatile) because of its pungent smell;

also is an ideal stain remover

Test:

Try to list at least eight acids and three alkalis and their uses (on a separate sheet of paper).

Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.2: We know this when the learner categorises information.

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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