Consider the balanced chemical equation. H2O2(aq)+3I−(aq)+2H+(aq)→I3−(aq)+2H 2O(l) In the first 15.0 s of the reaction, the concentration of I− drops from 1.000 M to 0.871 M .Part A Predict the rate of change in the concentration of H2O2 (Δ[H2O2]/Δt). Express the rate to three significant figures and include the appropriate units. Δ[H2O2]/Δt Δ [ H 2 O 2 ] / Δ t =

Part B Predict the rate of change in the concentration of I3− (Δ[I3−]/Δt). Express the rate to three significant figures and include the appropriate units. Δ[I3−]/Δt Δ [ I 3 − ] / Δ t =

Part A. 8.60 × 10⁻³ M/s

Part B. 8.60 × 10⁻³ M/s

Explanation:

Let's consider the following balanced chemical equation.

H₂O₂(aq) + 3 I⁻(aq) + 2 H⁺(aq) → I₃⁻(aq) + 2 H₂O(l)

Part A

The rate of change in the concentration of H₂O₂ is:

-Δ[H₂O₂]/Δt = -(0.871 M - 1.000 M)/15.0 s = 8.60 × 10⁻³ M/s

Part B

The molar ratio of H₂O₂(aq) to I₃⁻(aq) is 1:1. The rate of change in the concentration of I₃⁻ is:

8.60 × 10⁻³ mol H₂O₂/L.s × (1 mol I₃⁻/1 mol H₂O₂) = 8.60 × 10⁻³ mol I₃⁻/L.s = 8.60 × 10⁻³ M/s

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

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