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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U” ) GREEN ZONE [GZ]
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26 A student would like to prepare calcium sulphate salt also known as „Plaster of
Paris‟. „Plaster of Paris‟ is use to support broken bones. Table 5 shows the chemical
reagents in the laboratory and the experimental procedure to prepare the salt.

Seorang pelajar ingin menyediakan garam kalsium sulfat yang juga dikenali sebagai
“Plaster of Paris”. “Plaster of Paris” digunakan untuk menyokong tulang yang
patah. Jadual 5 menunjukkan bahan-bahan kimia yang terdapat di dalam makmal
dan langkah-langkah kaedah penyediaan garam.

Chemical reagent Experimental procedure
Bahan kimia Langkah eksperimen
Calcium oxide Mix the chemical
P L1
Kalsium oksida Campurkan bahan kimia
Calcium carbonate Heat the mixture
Q L2
Kalsium karbonat Panaskan campuran
Calcium nitrate Filter the mixture
R L3
Kalsium nitrat Turaskan campuran
Sulphuric acid Cool the filtrate
S L4
Asid sulfurik Sejukkan hasil turasan
Rinse the residue with distilled
L5
Sodium nitrate Bilas baki turasan dengan air suling
T
Natrium nitrat Dry the salt
L6
Keringkan garam
Table 5 / Jadual 5

Which pair of chemical reagent and experimental procedure is the correct to produce
calcium sulphate salt?
Pasangan bahan kimia dan kaedah manakah betul untuk menghasilkan garam
kalsium sulfat?

Chemical reagent Experimental procedure

Bahan kimia Langkah experimen
A Q + S L1, L3, L5, L6
B R + T L1, L3, L5, L6
C P + T L1, L2, L3, L4, L6
D Q + T L1, L2, L3, L4, L6

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