Question

Газ образуется при взаимодействии растворов... а)KCl и Na2CO3 б)CaCO3 и HCl в) K2CO3 и NaOH г) Na2CO и CaCl2

Answer 1

CaCO3+2HCL=CaCL2+H2O+CO2-газ который образуется 

Answer 2

Gas Formation from Solution Interactions

When gases are formed during the interaction of solutions, it is important to consider the chemical reactions that take place. Let's examine the given interactions to determine which ones result in gas formation.

a) KCl and Na2CO3 b) CaCO3 and HCl c) K2CO3 and NaOH d) Na2CO and CaCl2

Gas Formation Reactions

a) KCl and Na2CO3 - When KCl (potassium chloride) and Na2CO3 (sodium carbonate) interact, the following reaction occurs: - 2KCl + Na2CO3 -> 2NaCl + K2CO3 - This reaction does not result in the formation of a gas.

b) CaCO3 and HCl - When CaCO3 (calcium carbonate) and HCl (hydrochloric acid) interact, the following reaction takes place: - CaCO3 + 2HCl -> CaCl2 + H2O + CO2 - This reaction results in the formation of carbon dioxide (CO2) gas.

c) K2CO3 and NaOH - When K2CO3 (potassium carbonate) and NaOH (sodium hydroxide) interact, the following reaction occurs: - K2CO3 + 2NaOH -> 2KOH + Na2CO3 - This reaction does not result in the formation of a gas.

d) Na2CO and CaCl2 - It seems there might be a typo in the given option "Na2CO." Assuming it refers to Na2CO3 (sodium carbonate), the reaction with CaCl2 (calcium chloride) would be: - Na2CO3 + CaCl2 -> 2NaCl + CaCO3 - This reaction does not result in the formation of a gas.

Conclusion

Based on the given interactions, the only pair that results in gas formation is CaCO3 and HCl, where the reaction produces carbon dioxide (CO2) gas.

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