Page 3 - 1202 Question Bank Chemistry Form 4 KSSM

MUST

KNOW Mnemonics

Acid, Base and Salt Acid, Base and Salt
• White precipitate in sodium hydroxide solution are
ZAP MgCa (Pronounced as “ZAP MeCa”)
Add a little sodium hydroxide solution
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BLUE RED sister loves SOUR plum No precipitate White precipitate formed

NH + ZAP MgCa
4
Zn Al Pb 2+ Mg Ca 2+
2+
3+
2+
BLUE litmus paper turns RED (Acid) Heat up and test with Add excess sodium
red litmus paper
hydroxide solution
NH + Precipitate Precipitate does
4 dissolves not dissolve
ZAP MgCa
2+
3+
2+
Zn Al Pb 2+ Mg Ca 2+
Mnemonics (Chapter 6) 1 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 6) 7 @ Pan Asia Publications Sdn. Bhd.
Acid, Base and Salt Acid, Base and Salt
• Soluble salt, NO SPA • White precipitate in ammonia solution are Zn MgPA
Sodium Ammonium (Pronounced as “Zinc Mengapa”)
Add a little ammonia solution
NO 3 – NO SPA No precipitate White precipitate formed

Potassium NH , Ca 2+ Zn MgPA
+
4
2+
2+
2+
3+
3+
• Insoluble salt Zn Al Mg Pb Al
PBC – Sulphate HPA – Chloride Add excess ammonia
P ← PbSO 4 H ← Hg Cl 2 solution and shake evenly
2
B ← BaSO 4 P ← PbCl 2 Precipitate Precipitate does
C ← CaSO A ← AgCl dissolves not dissolve
4
Zn MgPA
2+
3+
2+
Zn 2+ Mg Pb Al
Mnemonics (Chapter 6) 3 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 6) 9 @ Pan Asia Publications Sdn. Bhd.
Acid, Base and Salt Manufactured Substances in Industry
• “Angcle Basuh Ferrari dgn Susu Pekat Nestle”
(Pronouced as Bronchus) (Pronouced as Zip cobra)
Bron Cu Sn Zip Cu bra
Any acid HNO HNO H SO
3 3 2 4
AgNO 3 Ang Ba(NO) 3 Ba Fe SO 4 Ferrari Bronze Copper Tin Zinc Copper Brass
2
Susu
H SO pekat pekat
2
4
(Pronouced as Steel IC)
Steel I C
CO 2– Cl – Cle SO 2– suh NO – Nestle
3 4 3
Steel Iron Carbon

Mnemonics (Chapter 6) 5 @ Pan Asia Publications Sdn. Bhd. Mnemonics (Chapter 8) 11 @ Pan Asia Publications Sdn. Bhd.