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3 years ago

5

Which piece of laboratory glassware did you find to be more efficient for the solvent extraction procedure, and why?

1 answer:

Anna [14]3 years ago

7 0

Answer:

Condenser

Explanation:

Condenser is highly efficient when dealing with the vapors of the product are need to be liquified. It is mostly automated and regularly condenses the incoming vapors into liquid. It is very easy to use. All we have to do it to attach incoming and outgoing flow pipes and constantly monitor the flow of cold water through the condenser. It is made up of special kind of PYREX glass so that it won't break when dealing with steam.

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3 years ago

Consider the following hypothetical aqueous reaction. A flask is charged with .065 mol of A in a total volume of 100.0 mL. The f

Inga [223]

Answer: 0.422 M⁻¹s⁻¹

Explanation: <u>Reaction</u> <u>Rate</u> is the speed of decomposition of the reactant(s) per unit of time.

A <u>Rate</u> <u>Law</u> relates concentration of reactants, rate reaction and rate constant:

$r=k[A]^{x}[B]^{y}$

where

[A] and [B] are reactants concentration

x and y are reaction order, not related to the stoichiometric coefficients

k is rate constant

r is rate

Before calculating rate constant, first we have to determine reaction order.

In this question, the reactio order is 2. So, the rate law for it is

$-\frac{d[A]}{dt} =k[A]^{2}$

and the integrated formula is

$\frac{1}{[A]} =\frac{1}{[A]_{0}} +kt$

in which

[A]₀ is initial concentration of reactant

Then, using initial concentration at initial time and final concentration at final time:

$\frac{1}{0.031} =\frac{1}{0.065} +k(40)$

$40k=\frac{1}{0.031}-\frac{1}{0.065}$

$40k=32.26-15.38$

k = 0.422

The rate constant for the reaction is 0.422 M⁻¹.s⁻¹

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3 years ago