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Zorluk: ZorChemical Reactions and Compounds

In a submarine life-support system, carbon dioxide (CO2CO_2) is scrubbed from the cabin atmosphere by reacting with solid lithium hydroxide (LiOHLiOH) to produce solid lithium carbonate (Li2CO3Li_2CO_3) and water vapor (H2OH_2O). Which of the following represents the correctly balanced chemical equation for this reaction?

  1. A
    LiOH+CO2→Li2CO3+H2OLiOH + CO_2 \rightarrow Li_2CO_3 + H_2O
  2. 2LiOH+CO2→Li2CO3+H2O2LiOH + CO_2 \rightarrow Li_2CO_3 + H_2OCevap
  3. C
    Li2OH+CO2→Li2CO3+H2OLi_2OH + CO_2 \rightarrow Li_2CO_3 + H_2O
  4. D
    LiOH+CO2→LiCO2+H2OLiOH + CO_2 \rightarrow LiCO_2 + H_2O

Cevap

The balanced chemical equation is 2LiOH+CO2→Li2CO3+H2O2LiOH + CO_2 \rightarrow Li_2CO_3 + H_2O.
Placing a coefficient of 2 in front of lithium hydroxide yields equal quantities of each element on both sides: 2 lithium atoms, 1 carbon atom, 4 oxygen atoms, and 2 hydrogen atoms, satisfying the law of conservation of mass.

Adım Adım Çözüm

1
Write the unbalanced skeleton equation using the correct chemical formulas for all reactants and products.
LiOH+CO2→Li2CO3+H2OLiOH + CO_2 \rightarrow Li_2CO_3 + H_2O
Establishing the correct formulas ensures that the identities of the chemical substances are maintained.
2
Count the number of each type of atom on both sides of the equation.
Reactants: 1 Li, 1 C, 3 O, 1 H. Products: 2 Li, 1 C, 4 O, 2 H.
An atom inventory reveals which elements violate the law of conservation of mass.
3
Place a coefficient of 2 in front of LiOHLiOH on the reactant side to balance the lithium and hydrogen atoms.
2LiOH+CO2→Li2CO3+H2O2LiOH + CO_2 \rightarrow Li_2CO_3 + H_2O
Using whole-number coefficients balances atoms without altering compound identities.
4
Re-verify the atom count for every element across the entire equation.
Reactants: 2 Li, 1 C, 4 O, 2 H. Products: 2 Li, 1 C, 4 O, 2 H.
Confirming equal atom counts ensures the equation satisfies the law of conservation of mass.

Anahtar Kavram

Balancing chemical equations by adding stoichiometric coefficients while keeping chemical formulas unchanged.
Tahmini Süre:1m 30s
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Konular

Chemical Reactions and Compounds

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