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Natural sciences

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

Educator section

Memorandum

Assignment 9:

a) Heartburn and peptic ulcers are caused by acids. An acid can be neutralised by an alkali. I will therefore drink an alkali to neutralise acids. The best household substances are milk or bicarbonate of soda, because they are alkalis that can neutralise heartburn. Also avoid the use of aspirin (acid).

b) A bee-sting is also acidic and needs to be neutralised with an alkali. I will put a bicarbonate of soda solution on the sting mark in order to neutralise the sting.

c) Since the sting is alkaline, it can be neutralised by putting an acid like vinegar/brandy on it.

d) Eat foods that contain less acids and are more alkaline or neutral. Avoid certain types of fruit, like oranges, tomatoes and fruit juices. Use a toothpaste that is more alkaline.

Leaner section

Content

Activity: to discuss the effect of acids and bases on everyday phenomena [lo 2.3]

A doctor made the discovery that the stomach contains hydrochloric acid to help with the digestion of food. He attached a small sponge to a string and swallowed it. After a while he retracted the sponge from his stomach and found that it was acidic. Sometimes people have an excess of hydrochloric acid and then suffer from heartburn. (a)

When a honeybee stings, a kind of acid is injected into the skin, while a wasp injects an alkali. Any bee sting really stings! (b)

The Portuguese man-of-war that is sometimes seen floating on the sea is also able to inflict a lot of pain when it comes into contact with your skin. The substance that causes pain is alkaline. (c)

The foodstuffs that we eat also contain many acids, which cause tooth decay. (d)

ASSIGNMENT 9

Study the information in (a) – (d) and suggest household substances that could relieve or prevent the discomfort or effects caused by the above substances and explain why you have selected these particular substances.

(a)__________________________________________________________________

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(2)

(b) __________________________________________________________________

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(2)

(c) _________________________________________________________________

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(2)

(d) __________________________________________________________________

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(3)

Assessment

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

Assessment Standard 2.3: We know this when the learner interprets information by identifying key ideas in text, finding patterns in recorded data, and making inferences from information in various forms (e.g. pictures, diagrams, text).

Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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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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