1)KBr→Br2→HBr→NaBr→AgBr
2)Ca→Ca(OH)2→CaCO3→Ca(HCO3)2
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2)Ca→Ca(OH)2→CaCO3→Ca(HCO3)2
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Answers & Comments
2. Br2 + H2 = 2HBr
3. HBr + NaOH = NaOH + H2O
4. NaBr + AgNO3 =
NaNO3 + AgBr⬇
1. Са + 2H2O = Ca(OH)2⬇
+ H2⬆
2. Ca(OH)2 + CO2 =
CaCO3⬇ + H2O
3. CaCO3 + H2CO3(CO2 +
H2O) = Ca(HCO3)2