Practical Work
ICSE · Class 9 · Chemistry
All formulas from Practical Work in ICSE Class 9 Chemistry. Key equations, constants, and identities for board exam preparation.
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Recognition and Identification of Gases
Zn + 2HCl → ZnCl2 + H2
2H2 + O2 → 2H2O
CaCO3 + 2HCl → CaCl2 + H2O + CO2
Ca(OH)2 + CO2 → CaCO3 ppt + H2O
CaCO3 + CO2 + H2O → Ca(HCO3)2
Action of Heat on Substances
CuCO3 → CuO + CO2
ZnCO3 → ZnO + CO2
Na2CO3·10H2O → Na2CO3 + 10H2O
CuSO4·5H2O → CuSO4 + 5H2O
2CuSO4 → 2CuO + 2SO2 + O2
Hard Water, Soft Water, Soap and Detergents
Ca(HCO3)2 + Na2CO3 → CaCO3 + 2NaHCO3
CaSO4 + 2NaSt → CaSt2 + Na2SO4
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