Molecular formula of alkyne containing 10 carbon atom

Decyne: C10H18

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The general formula for alkynes is CnH2n-2

the number of carbon atoms is 10 so the number of hydrogen atoms will be 10*2-2=20-2=18hydrogen atoms

the molecular formula for this alkyne is :

C₁₀H₁₈ which is called decyne

The time needed for the reaction will increase.

Explanation:

As we know from kinetics of chemical reaction that the rate of the reaction (except zero order reactions) depends on the concentration of the reactants.

Rate of chemical reaction α [reactants].

If we suppose here that the reaction is a second order reaction which means that the reaction depends on the concentration of both H₂SO₄ and thiosulfate.

∴ Rate of the reaction = k[H₂SO₄][thiosulfate].

where, k is the rate constant of the reaction.

Here, the concentration of H₂SO₄ is constant, since we use a constant a mount of it.The concentration of thiosulfate decreased from flask 1 to flask 5 as the amount of added thiosulfate decreased.

Rate α [thiosulfate]

As the concentration of the thiosulfate decreased, the rate of the reaction will decrease.The rate of the reaction is the change in the concentration of the reactants per time.

Rate of the reaction = - Δ[thiosulfate]/Δt.

As we mentioned that the concentration of thiosulfate decreased, since the rate of the reaction will decrease.The rate of the reaction is inversely proportional to time (rate α 1/t).

∴ The time needed for the reaction will increase from flask 1 to flask 5.