Question

predict the product(s) of this single replacement reaction: 2 al + 6 hcl → al₂(hcl)₆ 2 hai + 3 hcl 2 alcl₃ + 3 h₂ 2 al + 3 h₂ + 3 cl₂

Explanation:

Step1: Analyze single - replacement reaction

In a single - replacement reaction \(A+BC
ightarrow AC + B\) (where \(A\) is a metal). Here, \(Al\) (a metal) reacts with \(HCl\).

Step2: Write the reaction based on metal - acid reaction

When a metal (\(Al\)) reacts with an acid (\(HCl\)), the general form is \(2Al+6HCl
ightarrow 2AlCl_3 + 3H_2\). \(Al\) replaces \(H\) in \(HCl\). \(Al\) has a + 3 charge, \(Cl\) has a - 1 charge, so \(AlCl_3\) is formed. And \(H\) atoms combine to form \(H_2\) gas.

Step3: Check other options

• Option A: \(Al_2(HCl)_6\) is not a valid product. \(HCl\) does not combine in this way in a single - replacement reaction.
• Option B: \(2HAI + 3HCl\) has incorrect formula (\(HAI\) is not a valid compound).
• Option D: \(2Al + 3H_2+3Cl_2\) implies no reaction (reactants \(Al\) and \(HCl\) are still present), which is wrong as a reaction occurs.

Answer:

C. \(2\text{AlCl}_3 + 3\text{H}_2\)