Tzu En's answer to elly's Secondary 3 E Maths Singapore question.
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A: HCl
B: CaCO3
C: AgCl
D: CuCl2
G is CO2
CO2 + Ca(OH)2 > CaCO3 + H2O
For the first reaction, between CaCO3 and A, CO2 was produced, suggesting that A is an acid that reacts with carbonate.
For second reaction, A reacts with AgNO3 to produce a white ppt, likely AgCl, suggesting that anion of A is Cl-.
Thus A is HCl
B: CaCO3
C: AgCl
D: CuCl2
G is CO2
CO2 + Ca(OH)2 > CaCO3 + H2O
For the first reaction, between CaCO3 and A, CO2 was produced, suggesting that A is an acid that reacts with carbonate.
For second reaction, A reacts with AgNO3 to produce a white ppt, likely AgCl, suggesting that anion of A is Cl-.
Thus A is HCl
Date Posted:
2 years ago
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