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The equipment shown is set up - HSC - SSCE Chemistry - Question 28 - 2015 - Paper 1
Question 28
The equipment shown is set up. After some time a ring of white powder is seen to form on the inside of the glass tube. Cotton wool soaked in concentrated hydrochlor... show full transcript
Worked Solution & Example Answer:The equipment shown is set up - HSC - SSCE Chemistry - Question 28 - 2015 - Paper 1
Step 1
Why would this NOT be an acid–base reaction according to Arrhenius?
Answer
This reaction would not be considered an Arrhenius acid-base reaction because it occurs in the gas phase rather than in an aqueous solution. Arrhenius defined acids and bases as substances that increase the concentration of H⁺ and OH⁻ ions, respectively, in aqueous solutions. Since this reaction takes place between gaseous substances, it does not fit into this definition.
Step 2
Explain why this would be considered a Brønsted–Lowry acid–base reaction. Include an equation in your answer.
Answer
This reaction is considered a Brønsted–Lowry acid-base reaction because it involves the transfer of protons (H⁺ ions) between the reacting species. In this case, hydrochloric acid donates a proton to ammonia. The relevant equation can be represented as:
Here, HCl acts as the acid (proton donor) and NH₃ acts as the base (proton acceptor).