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Chemistry Form 4 • MODULE

(ii) Draw a diagram of the apparatus set-up to carry out reaction I.
Lukiskan gambar rajah susunan radas untuk menjalankan tindak balas I.

Solid M

Heat

Lime water

(b) Name solids M and Q.
Nyatakan nama pepejal M dan Q.
M : Zinc carbonate Q: Zinc oxide
(c) State the observations made when excess ammonia solution is added to solution S.
Nyatakan pemerhatian yang dibuat apabila larutan ammonia berlebihan ditambahkan kepada larutan S.
White precipitate, soluble in excess of ammonia solution
(d) (i) Write the chemical equation for reaction II.
Tuliskan persamaan kimia bagi tindak balas II.
ZnCO + 2HNO Zn(NO ) + H O + CO
3 3 3 2 2 2
(ii) For reaction II, calculate the volume of carbon dioxide gas released at room condition if 12.5 g solid M
decomposes completely. [Relative atomic mass: C =12, O =16, Zn = 65, 1 mole of gas occupies 24 dm at
3
room condition]
Bagi tindak balas II, hitungkan isi padu gas karbon dioksida yang dibebaskan pada keadaan bilik, jika 12.5 g pepejal M terurai
dengan lengkap. [Jisim atom relatif: C = 12, O = 16, Zn = 65, 1 mol gas menempati 24 dm pada suhu bilik]
3
12.5
Mol of solid M = = 0.1 mol
125
From the equation, 1 mol M : 1 mol CO
2
0.1 mol M : 0.1 mol CO
2
Volume of CO = 0.1 mol × 24 dm mol = 2.4 dm 3
–1
3
2
(e) Name reaction III.
Namakan tindak balas III.
Displacement reaction

(f) Describe a chemical test to determine the presence of anion in the magnesium nitrate solution.
Huraikan ujian kimia untuk menentukan kehadiran anion dalam larutan magnesium nitrat.
– About 2 cm of magnesium nitrate solution is poured into a test tube.
3
Masukkan 2 cm larutan magnesium nitrat ke dalam tabung uji.
3
3
– 2 cm of dilute sulphuric acid is added to the solution followed by 2 cm of iron(II) sulphate solution.
3
3
2 cm asid sulfurik cair ditambah kepada larutan diikuti dengan larutan ferum(II) sulfat .
– The mixture is shaken .
Campuran digoncang .
– The test tube is slanted and held with a test tube holder.
Tabung uji dicondongkan dan dipegang dengan pemegang tabung uji.
– A few drops of concentrated sulphuric acid is dropped along the wall of the test tube and is held upright.
Beberapa titis asid sulfurik pekat dititiskan melalui dinding tabung uji dan ditegakkan.
– A brown ring is formed between two layers.
Gelang perang terbentuk antara dua lapisan.
– Anion present is nitrate ion.
Anion yang hadir adalah ion nitrat .

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07-Chem F4 (3p).indd 163 12/9/2011 5:55:24 PM