i)
Name the two elements that combines to form ammonia gas.
ii)
Write a balanced chemical equation for the formation of ammonia from the elements named in (i).
Write down the systematic name of each of the following chemical compounds:
(i)
FeS;
(ii)
CO;
(iii)
Cu2O;
(iv)
NaOH.
Classify the following chemical substances basd on their uses under the headings as shown in the table below: Milk of magnesia, alcohol, paracetamol, sodium hydroxide, N.P.K.
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Write and balance each of the following chemical equations:
i)
Fe + O2 → Fe2O3;
ii)
Na + Cl2 → NaCl;
iii)
H2 + O2 → H2O.
Write the systematic name of each of the following chemical compounds:
(α)
FeS;
(β)
SO2;
(γ)
CO2.
(i)
What is a compound?
(ii)
Give two properties of a compound
(iii)
Write down the name and the chemical formula of the compound formed between the following elements:
(α)
hydrogen and chlorine
(β)
magnesium and oxygen
Write a balanced chemical equation to show the reaction between hydrogen and oxygen.
Sodium chloride is prepared by the reaction between dilute hydrochloric acid and sodium hydroxide.
(i)
Write a balanced equation for the reaction.
(ii)
What is the name given to this reaction?
Write down the systematic names of the following compounds:
(i)
CaCo3;
(ii)
FeS;
(iii)
NaCl;
(iv)
NaOH.
Give two examples of compound
Write the systematic names of the following substances:
α)
CuO
β)
SO2
Write the name and chemical formula of the compounds formed when the following elements combine:
i)
zinc and oxygen
ii)
calcium and chlorine
Complete and balance the following chemical reaction:
CaCO3 + HCl →
Name the elements which make up the following compounds:
i)
water
ii)
common salt
iii)
ammonia
Define compound
Write the chemical names of each of the following compounds:
i)
MgCl2
ii)
FeS
iii)
NH4OH
iv)
AgCl
Give the names of the products formed when the following pairs of compounds react together:
α)
NH4OH and dilute HCl
β)
CaCO3 and dilute HCl
Write down the chemical formula for each of the following compounds:
i)
sodium chloride
ii)
copper sulphate
iii)
magnesium sulphate
iv)
potassium carbonate
Name the compounds formed when the following elements combine:
(i)
zinc and oxygen
(ii)
calcium and chlorine
(iii)
sodium and bromine
(iv)
potassium and iodine
Write the chemical formula for each of the following compounds:
(i)
calcium hydroxide
(ii)
zinc chloride [zinc (II) chloride]
(iii)
sodium nitrate [sodium trioxonitrate (V)]
(iv)
calcium carbonate [calcium trioxocarbonate (IV)]
(v)
potassium sulphate [potassium tetraoxosulphate (VI)]
Write down the names of the new substances formed when the following substances are allowed to react:
(i)
Sodium hydroxide and dilute sulphuric acid
(ii)
Calcium carbonate and dilute hydrochloric acid
(iii)
Ammonia and dilute sulphuric acid
Write down the names of the following compounds:
(i)
NH4Cl
(ii)
HCl
(iii)
CuSO4
(iv)
FeCl3
Name the compound formed when theh following elements combine:
(i)
Iron and sulphur
(ii)
Zinc and oxygen
(iii)
Sodium and chlorine
(iv)
Calcium and chlorine
Write down the names of the new substances formed when each of the following substances react with dilute hydrochloric acid.
(i)
Ammonia
(ii)
Sodium hydroxide
(iii)
Calcium carbonate
Write the chemical formulae for the following substances.
(i)
Calcium oxide;
(ii)
Water;
(iii)
Copper sulphate.
Write down the chemical names of the following compounds.
(i)
MgCl2
(ii)
FeS
(iii)
CuSO4
(iv)
NH4OH
Write down balanced chemical equations for the preparation of the following substances.
α)
Sodium Chloride: Prepared from a reaction between Sodium hydroxide and dilute hydrochloric acid
β)
Ammonia: Prepared from a reaction between nitrogen and hydrogen.
Describe briefly the formation of an ammonia molecule after an interaction between 1H and 7N atoms.
Predict the products formed when:
(i)
magnesium solution reacts with dilute hydrochloric acid;
(ii)
potassium reacts with water.
Write the word equation for each of the following reactions between:
(α)
calcium and oxygen
(β)
nitrogen and hydrogen
A mixture of iron filings and sulphur is heated in a test tube
(i)
Give the name of the compound formed
(ii)
Write the chemical equation of the reaction which took place.
(iii)
State two methods of preventing iron from rusting.
Write word equation for each of the following chemical reactions:
i)
Oxygen and hydrogens;
ii)
Nitrogen and hydrogen;
iii)
Sodium and chlorine.
Write the systematic name for each of the following compounds.
i)
H2O;
ii)
MgO;
iii)
CaO;
iv)
CaCl2.
Give one example of a chemical compound used in:
i)
medicine;
ii)
agriculture;
iii)
industry.
Write the formula for each of the following compounds:
i)
calcium chloride;
ii)
copper (I) oxide;
iii)
nitrogen (IV) oxide;
iv)
ammonia.
i)
What is binary compound?
ii)
Write the chemical formula of the compound formed between:
(α) Oxygen and lithium
(β) Magnesium and Chlorine
iii)
Name the compound formed in (ii)(α)
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