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Which reaction produces gas that turns lime water milky?  

A) Zn + 2HCl -> ZnCl2 + H2  
B 2KClO3 -> 2KCl + 3O2  
C) CaCO3 -> CaO + CO2  
D) 2NaCl -> 2Na + Cl2

Sagot :

Indrawboyidn

C) CaCO₃ ⇒CaO + CO₂ produces gas (CO₂) that turns lime water (Ca(OH)₂) milky

Further explanation

Calcium hydroxide Ca (OH)₂ is one of the bases obtained from the reaction between lime dissolved in water

CaO + H₂O ⇒ Ca (OH)₂

When the CO₂ gas reacts with Ca (OH)₂, the solution will become turbid due to a reaction to the formation of calcium carbonate deposits

Ca (OH)₂(aq) + CO₂ (g) ⇒ CaCO₃ (s) + H₂O (l)

CaCO₃ (s) itself will undergo a decomposition reaction

CaCO₃ ⇒ CaO + CO₂

so that cycles can occur

Learn more

Single replacement reaction

https://brainly.ph/question/535429

the symbol for a chemical reaction

https://brainly.ph/question/2122300

statements describe a double replacement reaction

https://brainly.ph/question/2155865

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