Questions: Select the best answer. Which reaction shows strong base dissociation? H2CO3 + Ca(OH)2 -> CaCO3 + H2 Al + H2O <=> AlH+ + OH- CH3CH2O- + H2O -> CH3CH2OH + OH- HSO4- + H2O <=> H+ + SO42-

Select the best answer. Which reaction shows strong base dissociation? H2CO3 + Ca(OH)2 -> CaCO3 + H2 Al + H2O <=> AlH+ + OH- CH3CH2O- + H2O -> CH3CH2OH + OH- HSO4- + H2O <=> H+ + SO42-
Transcript text: 18. Select the best answer. Which reaction shows strong base dissociation? $\mathrm{H}_{2} \mathrm{CO}_{3}+\mathrm{Ca}(\mathrm{OH})_{2} \rightarrow \mathrm{CaCO}_{3}+\mathrm{H}_{2}$ $\mathrm{Al}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{AlH}^{+}+\mathrm{OH}^{-}$ $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{O}^{-}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{OH}^{-}$ $\mathrm{HSO}_{4}{ }^{-}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}^{+}+\mathrm{SO}_{4}^{2-}$
failed

Solution

failed
failed

Solution Steps

Step 1: Identify the Definition of Strong Base Dissociation

A strong base dissociation reaction involves a strong base completely dissociating into its ions in water. Strong bases typically include hydroxides of alkali metals and some alkaline earth metals.

Step 2: Analyze Each Reaction

  1. $\mathrm{H}_{2} \mathrm{CO}_{3}+\mathrm{Ca}(\mathrm{OH})_{2} \rightarrow \mathrm{CaCO}_{3}+\mathrm{H}_{2}$:

    • This reaction involves calcium hydroxide, a strong base, but it is a neutralization reaction, not a dissociation.

  2. $\mathrm{Al}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{AlH}^{+}+\mathrm{OH}^{-}$:

    • This reaction involves aluminum reacting with water, not a strong base dissociation.

  3. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{O}^{-}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{OH}^{-}$:

    • This reaction shows the ethoxide ion reacting with water to produce ethanol and hydroxide ions. This is a dissociation reaction involving a strong base (ethoxide ion).

  4. $\mathrm{HSO}_{4}{ }^{-}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}^{+}+\mathrm{SO}_{4}^{2-}$:

    • This reaction involves the bisulfate ion, which is not a strong base, dissociating in water.
Step 3: Select the Best Answer

The reaction that shows strong base dissociation is the one involving the ethoxide ion, which is a strong base.

Final Answer

\[ \boxed{\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{O}^{-}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{OH}^{-}} \]

Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
A county has 88 schools. The county received 992 new computers. Are there enough computers so that each school can get 11 new computers? Explain.
failedAnswered
y=2x^2-16x+33
failedAnswered
2 Points At divergent plate boundaries: (A) plates move apart and new lithosphere is formed (B) plates come together and new lithosphere is formed (C) plates slide horizontally past each other (D) none of the other answers is correct (E) plates come together and one plate is recycled into the mantle
failedAnswered
List all numbers from the given set that are a. natural numbers, b. whole numbers, c. integers, d. rational numbers, e. irrational numbers, and f. real numbers. [ left-13,-frac37, 0,0.2, sqrt7, pi, sqrt64right ] Drag each of the numbers given above into the appropriate category below. Numbers may be members of more than one subset of real numbers. natural numbers whole numbers integers rational numbers irrational numbers real numbers
failedAnswered
Em uma prova de ciclismo, os atletas devem percorrer 614 metros no circuito representado na figura abaixo. Quantas voltas os ciclistas precisam completar para finalizar a prova? (Use π=3,14.) Quanto mede o raio de uma circunferência sabendo-se que um arco de comprimento 25,12 cm determina um ângulo central de 24° ? (Use π=3,14.)