Question

based on the activity series, which one of the given reactions will occur?
most reactive least reactive
li na k mg al zn fe ni sn pb h cu ag pt
f₂ cl₂ br₂ i₂
hint: is the free element more reactive than the one in the compound?
pb + niso₄ →
zn + hno₃ →
mg + kno₃ →
sn + zn(no₃)₂ →

Explanation:

Step1: Check reactivity of Pb and Ni

From the activity series, Ni is more reactive than Pb. So, Pb cannot displace Ni from \(NiSO_4\).

Step2: Check reactivity of Zn and H

From the activity series, Zn is more reactive than H. So, Zn can displace H from \(HNO_3\).

Step3: Check reactivity of Mg and K

From the activity series, K is more reactive than Mg. So, Mg cannot displace K from \(KNO_3\).

Step4: Check reactivity of Sn and Zn

From the activity series, Zn is more reactive than Sn. So, Sn cannot displace Zn from \(Zn(NO_3)_2\).

Answer:

\(Zn + HNO_3\to\)