<< Chapter < Page Chapter >> Page >

Natuurwetenskappe

Materie, meting en reaksies

Reaksies tussen soorte materie: sure en basisse

Opvoeder afdeling

Memorandum

Opdrag 9:

(a) Sooibrand of maagsere word veroorsaak deur sure. ‘n Suur kan deur ‘n basis geneutraliseer word. Ek sal dus ‘n basis drink om die sure te neutraliseer. Die beste huishoudelike middel is melk of koeksoda, want dit is basisse en kan die sooibrand neutraliseer. Vermy ook die gebruik van spiriene (suur).

(b) ‘n Bysteek is ook suur en moet dus weer deur ‘n basis geneutraliseer word. Ek sal ‘n koeksoda-oplossing op die bytplek smeer om weer eens die suur te neutraliseer.

(c) Siende dat die steek alkalies is, kan dit geneutraliseer word deur ‘n suur, bv. asyn/brandewyn, daarop te smeer.

(d) Eet kosse wat minder sure bevat en meer alkalies of neutraal is. Vermy sekere vrugtesoorte soos lemoene, tamaties en vrugtesappe. Gebruik ‘n tandepasta wat meer alkalies van aard is.

Leerder afdeling

Inhoud

Aktiwiteit: om die uitwerking van sure en basisse op verskynsels in ons alledaagse lewe te kan bespreek [lu 2.3]

Dit was ‘n dokter wat ontdek het dat daar soutsuur in jou maag is wat help om die kos wat jy eet te verteer. Hy het ‘n klein sponsie aan ‘n tou vasgebind en toe ingesluk tot in sy maag. Na ‘n rukkie het hy die sponsie weer uitgetrek en gevind dat dit suur is. Soms het ons ook oortollige maagsure en kry dan sooibrand. (a)

Wanneer ‘n by jou steek, spuit hy ‘n suur in jou vel in en wanneer ‘n perdeby jou steek, spuit hy ‘n alkali in jou vel. So ‘n bysteek kan brand! (b)

‘n Bloublasie wat in die see ronddryf, kan jou baie seermaak as dit aan jou raak. ‘n Bloublasie se brand is alkalies. (c)

Die kosse wat ons eet, bevat baie sure wat tandbederf veroorsaak. (d)

OPDRAG 9

Bestudeer die gegewens in (a) – (d) en stel die huishoudelike middels voor wat die ongerief / gevolge sal verlig / keer en verduidelik waarom jy juis op hierdie middels besluit het.

(a)__________________________________________________________________

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

(2)

(b) __________________________________________________________________

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

(2)

(c) _________________________________________________________________

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

(2)

(d) __________________________________________________________________

____________________________________________________________________

_____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

____________________________________________________________________

(3)

Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer: identifiseer kernidees in die teks, vind patrone in aangetekende data en maak gevolgtrekkings uit inligting in verskeie vorme (prente, diagramme, ens.).

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 7' conversation and receive update notifications?

Ask