Page 197 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

+
SPM Chemistry A xplosive Module (Chemistry A Ticket For “U”) ANSWERS

21 Acid and bases A 2 KOH + H 2SO 4 K 2SO 4 + 2H 2O

M 1V 1 / M 2V 2 = a/b
(0.2)(25)/M 2(25) = 2/1
M 2 = 0.1 moldm -3

22 Salts C The reaction between lead (II) nitrate and potassium
iodide solutions produces the yellow lead (II) iodide
precipitate.
Pb(NO 3) 2 + 2KI  PbI 2 + 2 KNO 3

Tindak balas di antara larutan plumbum(II) nitrat
dan larutan kalium iodida menghasilkan mendakan
plumbum(II) iodida yang bewarna kuning.
Pb(NO 3) 2 + 2KI  PbI 2 + 2 KNO 3

23 Salts D P is more electropositive than Q. P= Zn, Q=Fe
Zinc displaced iron from iron(II)nitrate solution to
form zinc nitrate and iron metal.

P lebih elektropositif berbanding Q. P=Zn, Q=Fe
Zink menyesarkan ferum daripada larutan ferum(II)
nitrat untuk membentuk zink nitrat dan logam ferum.

24 Salts C PbCO 3 PbO + CO 2
Lead(II) oxide, PbO is brown when hot and yellow
when cold.

Plumbum(II) oksida, PbO bewarna perang semasa
panas dan kuning semasa sejuk.

25 Salts A Ammonium chloride solution contains ammonium
ions as the cation and the chloride ion as the anion.
Ammonium ion is tested by using Nessler reagent.
Chloride ion forms a white precipitate with silver
nitrate solution.

Larutan ammonium klorida mengandungi ion
ammonium sebagai kation dan ion klorida sebagai
anion. Ion ammonium diuji dengan menggunakan
reagen Nessler. Ion klorida membentuk mendakan
putih apabila diuji dengan larutan argentum nitrat.

26 Manufactured Substances C Sulphur dioxide dissolves in water to form
in Industry sulphurous acid which causes acid rain.

Sulfur dioksida melarut di dalam air untuk
membentuk asid sulfurus yang menyebabkan hujan
asid.

Sektor Pembelajaran, Jabatan Pendidikan Negeri Sabah | 2020 196