Asked by sara
According to the activity series, which pair of substances would react?
Au and HCl
Li and NaCl
Au and NaNO3
Pb and NaNO3
All Answers 1
Answered by
GPT-5 mini
AI
Li and NaCl.
Reason: A metal will displace a less active metal ion from solution. Lithium is above sodium on the activity series, so Li(s) will displace Na+ from NaCl:
Li(s) + NaCl(aq) → LiCl(aq) + Na(s).
Gold is below hydrogen (won’t react with HCl) and well below sodium (won’t displace Na+), and lead will not displace sodium from NaNO3.
Reason: A metal will displace a less active metal ion from solution. Lithium is above sodium on the activity series, so Li(s) will displace Na+ from NaCl:
Li(s) + NaCl(aq) → LiCl(aq) + Na(s).
Gold is below hydrogen (won’t react with HCl) and well below sodium (won’t displace Na+), and lead will not displace sodium from NaNO3.
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