Question

1. identify the single replacement reaction that will not occur.

hint: use the activity series.
the element that is alone must be higher than the element it will replace for the reaction to take place.
cs + znso₄ →
mg + na₂so₄ →
cs + nano₂ →

Explanation:

Step1: Analyze \( \text{Cs} + \text{ZnSO}_4

ightarrow \)
Check activity series: Cs is above Zn (Cs is more reactive). So Cs can replace Zn. Reaction occurs.

Step2: Analyze \( \text{Mg} + \text{Na}_2\text{SO}_4

ightarrow \)
Check activity series: Mg is below Na (Na is more reactive than Mg). So Mg cannot replace Na. Reaction does not occur.

Step3: Analyze \( \text{Cs} + \text{NaNO}_3

ightarrow \)
Check activity series: Cs is above Na (Cs is more reactive). So Cs can replace Na. Reaction occurs.

Answer:

\( \text{Mg} + \text{Na}_2\text{SO}_4
ightarrow \) (this single replacement reaction will not occur)