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“We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.” ― Antoine Lavoisier, Elements of Chemistry

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The science of today is the technology of tomorrow, Edward Teller

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Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing or learning to do. Pele

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Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence. Helen Keller

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Science without religion is lame, religion without science is blind. Albert Einstein

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Insanity: doing the same thing over and over again and expecting different results. Albert Einstein

Tuesday, 28 May 2013

Friday, 24 May 2013

Acids Bases - Checkpoint

FOR CP1
Dear CP1.....Do this worksheet as your assignment. Do this in doc/docx/pdf format. Send it to: markusanth2708@gmail.com). The sooner is better, you will get more extra points :)

ACIDS and BASES WORKSHEET-1
Most people think of acids as corrosive liquids which fizz when they come into contact with solid and burn when they touch the skin. The word acid comes from the latin word acidus meaning sour. As bases neutralise acids they are sometimes described as having properties which are opposite to acids. (Cambridge Checkpoint, Peter D Riley)

Answer the following questions.
  1. Why does wine go sour faster if the cork is removed from the bottle?
  2. How do you think the term of organic acid? Give example.
  3. How is a dilute solution different from a concentrated one?
  4. Which of the following substances are bases – copper chloride, sodium hydroxide, calcium carbonate, magnesium sulphate, copper oxide, lead nitrate, sodium hydrogen carbonate?
  5. Why are bases sometimes described as opposite of acids?
  6. How are acids and bases similar?
  7. Write word equations for the reactions between:

a.      Sulphuric acid and zinc oxide
b.      Hydrochloric acid and calcium hydroxide
c.       Nitric acid and calcium carbonate
d.      Hydrochloric acid and zinc carbonate
8.    How is the neutralisation of a carbonate different from the neutralisation of an oxide or a hydroxide?

Thursday, 23 May 2013

Acid-Base Worksheet

For CP1 only:
Dear CP1.....   Print this worksheet out as your assignment. Submit it before the chemistry test on my desk. click to download

Wednesday, 22 May 2013

sound worksheet

pressure worksheet

Monday, 13 May 2013

exothermic/endothermic reaction part-2

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Acid Rain Presentation

Anion - Cation List

simple ions:
Hydride
H-
Oxide
O2-
Fluoride
F-
Sulfide
S2-
Chloride
Cl-
Nitride
N3-
Bromide
Br-
Iodide
I-
Oxoanions:
Arsenate
AsO43-
Phosphate
PO43-
Arsenite
AsO33-
Hydrogen phosphate
HPO42-
Dihydrogen phosphate
H2PO4-
Sulfate
SO42-
Nitrate
NO3-
Hydrogen sulfate
HSO4-
Nitrite
NO2-
Thiosulfate
S2O32-
Sulfite
SO32-
Perchlorate
ClO4-
Iodate
IO3-
Chlorate
ClO3-
Bromate
BrO3-
Chlorite
ClO2-
Hypochlorite
OCl-
Hypobromite
OBr-
Carbonate
CO32-
Chromate
CrO42-
Hydrogen carbonate
or Bicarbonate
HCO3-
Dichromate
Cr2O72-
Anions from Organic Acids:
Acetate
CH3COO-
formate
HCOO-

Others:
Cyanide
CN-
Amide
NH2-
Cyanate
OCN-
Peroxide
O22-
Thiocyanate
SCN-
Oxalate
C2O42-
Hydroxide
OH-
Permanganate
MnO4-

Common Cations: (ions grouped by charge)
Name
Formula
Other name(s)
Ammonium
NH4+
Barium
Ba+2
Calcium
Ca+2
Chromium(II)
Cr+2
Chromous
Chromium(III)
Cr+3
Chromic
Copper(I)
Cu+
Cuprous
Copper(II)
Cu+2
Cupric
Iron(II)
Fe+2
Ferrous
Iron(III)
Fe+3
Ferric
Hydrogen
H+
Hydronium
H3O+
Lead(II)
Pb+2
Magnesium
Mg+2
Manganese(II)
Mn+2
Manganous
Manganese(III)
Mn+3
Manganic
Mercury(I)
Hg2+2
Mercurous
Mercury(II)
Hg+2
Mercuric
Nitronium
NO2+
Strontium
Sr+2
Tin(II)
Sn+2
Stannous
Tin(IV)
Sn+4
Stannic