The Steps in a Reaction Mechanism Are as Follows $\leftrightarrow$ Ag²⁺(aq) + Ce³⁺(aq)
Step 2: Tl⁺(aq) + Ag²⁺(aq)

question 129

Multiple Choice

The steps in a reaction mechanism are as follows. Which species is acting as a catalyst?
Step 1: Ag⁺(aq) + Ce⁴⁺(aq) $\leftrightarrow$ Ag²⁺(aq) + Ce³⁺(aq)
Step 2: Tl⁺(aq) + Ag²⁺(aq) $\rightarrow$ Tl²⁺(aq) + Ag⁺(aq)
Step 3: Tl²⁺(aq) + Ce⁴⁺(aq) $\rightarrow$ Tl³⁺(aq) + Ce³⁺(aq)

• A) Ag⁺
• B) Tl⁺
• C) Ce³⁺
• D) Ag²⁺
• E) Tl³⁺

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Definitions:

Intermediate Mass

In the context of the thalamus, it's the part that connects the two lobes of the thalamus at their medial surfaces.

Cerebellum

A part of the brain that regulates motor movements, balance, and coordination.

Muscle Tone

The continuous and passive partial contraction of muscles, or the muscle's resistance to passive stretch during resting state.

Heart Rate

The number of heartbeats per unit of time, usually expressed as beats per minute (bpm).