Question

which are produced when hcl reacts with ca(oh)₂?
○ cl₂, h₃, and cao
○ cacl and h₃o
○ cao, cl₂, and h₂o
○ cacl₂ and h₂o

Explanation:

Step1: Identify the reaction type

$\ce{HCl}$ (hydrochloric acid) and $\ce{Ca(OH)_{2}}$ (calcium hydroxide) undergo a neutralization reaction (a type of double - displacement reaction). In a neutralization reaction between an acid and a base, the products are a salt and water.

Step2: Write the chemical reaction

The general form of the reaction between an acid ($\ce{HCl}$) and a base ($\ce{Ca(OH)_{2}}$) is:
$$\ce{2HCl + Ca(OH)_{2}\xlongequal{}CaCl_{2} + 2H_{2}O}$$
Let's check the other options:

• Option 1: $\ce{Cl_{2}}$, $\ce{H_{3}}$ (which is not a common chemical species) and $\ce{CaO}$ are not products of the reaction between an acid and a base. The reaction does not involve the formation of elemental chlorine or a non - existent $\ce{H_{3}}$ and calcium oxide in this context.
• Option 2: The formula for calcium chloride is incorrect. It should be $\ce{CaCl_{2}}$ (calcium has a + 2 charge and chloride has a - 1 charge, so two chloride ions are needed to balance the charge of one calcium ion) and the formula $\ce{H_{3}O}$ is incorrect (the correct formula for water is $\ce{H_{2}O}$ or in the case of hydronium ion $\ce{H_{3}O^{+}}$, but in this neutralization reaction, water $\ce{H_{2}O}$ is formed).
• Option 3: $\ce{CaO}$, $\ce{Cl_{2}}$ and $\ce{H_{2}O}$ are not the products. The reaction between an acid and a base does not produce calcium oxide or elemental chlorine.
• Option 4: From the balanced chemical equation $\ce{2HCl + Ca(OH)_{2}\xlongequal{}CaCl_{2} + 2H_{2}O}$, the products are calcium chloride ($\ce{CaCl_{2}}$) and water ($\ce{H_{2}O}$), which matches this option (after correcting the possible typo in the option to have the correct formula $\ce{CaCl_{2}}$).

Answer:

D. $\ce{CaCl_{2}}$ and $\ce{H_{2}O}$ (assuming the last option is labeled D, with the correct formula $\ce{CaCl_{2}}$ and $\ce{H_{2}O}$)