Absorption of CO2 in KOH solution during combustion analysis is:
Correct answer: A. Chemical change
- A. Chemical change
- B. Physical change
- C. Neither chemical nor physical change
- D. CO2 absorbed in Mg(C1O4)2
Explanation
Option a) "Chemical change" is correct because the absorption of CO2 in KOH solution involves a chemical reaction. When CO2 is absorbed in a KOH solution, it reacts with the potassium hydroxide (KOH) to form potassium carbonate (K2CO3) through a chemical reaction.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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